Quality to reasonable prices!

Index:

• Docking Systems (Pontoons, Boats, Motors)
• Netcage Systems (Cages, Nets, Traps)
• Recirculation Systems (Tanks, Filters, Heaters)
• Aeration Systems (Injectors, Blowers, Diffusers)
• Analysing Systems (Meters, Sensors, Probes)
• Breeding Systems (Throughs, Boxes, Jars)
• Feeding Systems (Spreaders, Pendulums, Blowers)
• Transportation Systems (Graders, Scales, Pumps)
• Processing Systems (Filleters, Skinners, Smokers)
• Freshwater Fishes (Chemicals, Consulting, Publications)
• Other (Prices, Conditions, Contact)

Docking Systems

MODULAR FLOATING DOCK SYSTEM for aquatic sports, aqua culture and environmental protection

25 years experience in "state of the art" floatation engineering worldwide, together with cutting edge technology and the most advanced production techniques are the base for the new extremely versatile PONTOON BUILDING BLOCK SYSTEM.

By utilising the friction co-efficient achieved by independent controlled flooding of modules we have refined this system to provide not only the most stable floating platform available, but also a high load capacity which can also be combined with a fender-sidebar system.

The single modules are easy to handle (weight: 6,2 kg) and guarantee a very high load capacity of 370 kg/m2 (815 lbs/10,8 sq ft). They are made of a high-quality synthetic, UV-stabilized and anti-static green material (Novolen) which is extremely resistant to the elements! With block measurements of 50 x 50 x 50 cm (1,65 x 1,65 x 1,65 ft), the standard freeboard is approximately 40 cm. Blocks are easily assembled by connecting 4 elements (= 1 m2) via connecting lugs, with one bolt which gives a secure, stable connection.

This building block system can be varied according to any desired layout or measurements and can be used to replace or extend existing pontoon systems. This seawater and acid resistant system requires no maintenance or cleaning and is extremely durable. It can be utilised throughout the year or the single modules can be stacked and stored. Unlike conventional wooden floats, the pontoon is made of a skid-proof material, and will not rot, it is also safer as it won't splinter, or have sharp edges, rusty nails etc.

The "Maritime-Technic- Pontoon System" contributes to water purity, is aesthetically pleasing and comes equipped for various anchoring configurations. Swimming ladder, railing post and boat fastening-eye are main accessories with options such as fender systems, UV- resistant ropes and for marinas, electricity distributors (w/wo illumination) are available.

More Info and Photos

MULTI-PURPOSE ALUMINIUM BOATS for fisheries and watersports

This boats are made of seawater resitant aluminium, welded with modern technologies and need no antifouling. The integrated floats secure this boats are unsinkable.
As accessoire the following is available: Stand with steering, Build-in-tank, Electro-outfitings, Swimming ladder, Reeling and Persenning etc.
The smaller recreational boats TypA are made as multi part and can be divided for transport (to 125x135x55 cm) or also extended on demand by additional boddy modules.
The larger working boats TypC are made in doubble wall and are verivied by Lloyd's Register in Hamburg and have the EU-conformity certificate (CE-Modul-C).
As standard the following types are available:

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Netcage Systems

SUBMERSIBLE WAVE PROOF OFFSHORE NET CAGES for fish farming

This cages are developed for industrial farming of various fish species (i.e.: Sea bass, Sea bream, Grouper, Salmon, Trout, Sturgeon) all the year round at exposed open water areas such as seas and oceans. To prevent damage from storm impact and to provide optimum conditions for fish farming, the cage can be submerged.
Completed with a painted or galvanized framework with a net chamber enclosed and a feed bunker on it allowing automatic feed supply and farming process supervision. To place the cage vertically, it is equipped with a special system providing its surfacing, submerging and positioning at a depth of 4-40 meter. Horizontal positioning of the cage is provided by the system of anchorage including anchor ties and anchors. Lightness and tracery of the cage are in full accordance with the sea landscape.
The cage structure is produced to the "Rules for Building and Classing Underwater Vehicles, Systems, and Hyperbaric Facilities" and passes control assembling and testing at the manufacturing plant. It will have the certificate of the official "Maritime Register of Shipping".
The steel work is marked and packed as packages or in boxes which can be transported in a standard 40-feet container.

The basic material of the (polygon) framework consists of rod welded tubular low carbon (grade A) steel elements, connected with each other by flange bolts. The three-dimensional framework forming a regular nonahedron in plan, with three slanting trusses, running from the vertical columns to the geometric centre, closing at the feeder casing. The upper contour is completed with service platforms, passage walkways (500 mm wide) with railings (1.000 mm high) and removable hand ropes, also to the feed bunker. The walkways and brackets are made of pipes with 120 mm in diameter. The vertical columns (720 mm in diameter, 2.250 mm long) house permanently buoyancy compartments, balancing tanks, and compensation tanks of residual buoyancy resulting from discharge of changing loads. Also sensors that measure depth of submergence, water temperature and underwater acoustic are housed there. The 5.980 mm long horizontal members of the bottom contour are made of pipes with 478 mm in diameter and house the main ballast tanks and compressed air cylinders, 6 of which are ballast compartments and 3 are compressed air cylinders. Three mooring walls with wooden guard rails are provided for service boat mooring. To provide for safety of work of the attending personnel, the cage is equipped with removable single row life-lines.
The shape of the whole structure and all separate sections are adjusted so that the cage experiences minimum rolls and trims at waves and current.
The experience of the underwater system operation has proved that the operation in the water column is the most effective structural measure to protects structures from corrosion. Hot galvanized coating provides the structure service life of more than 20 years. This coating is reliable, practically excluding restoration and repair.
The system of automatic underwater feed distribution is intended for storage and measured distribution of feed for an autonomous operation of 7-30 days and located at the geometric centre of the cage. The system consists of a water tight bunker of 3.000 litre (2 tons feed in average) of cylinder conical shape (1.412 mm in diameter and 2.890 mm in height) and an automatically feed distributor (with a microprocessor) with a volumetric type dosage of 5 litre each. Compressed air is supplied to the pneumatic device by pipelines from compressed air cylinders, which are replenished from a service boat, equipped with a compressor. To prevent water penetration into the feeder, its upper part is equipped with a water tight hatch with a rack-and-pinion lock. Inside the feeder the upper part houses solenoid valves, system controller and (24 Volt, 125 Ah) batteries. The system is made of corrosion proof steel (6-8 mm thickness) and non-ferrous metals.
To submerge and surface the cage it is equipped with ballast compartments. The main ballast tanks are filled by gravity via drain holes equipped with ventilating valves with a remote control pneumatic drive. The balancing tanks are filled via kingston valve. The water from ballast compartments is replaced by compressed air (5-10 kg/cm3), supplied from the service boat compressor (min. 150 l/min). Air to the actuators is supplied through the pipelines made of corrosion proof steel and rubberized hoses. The process of submerging and surfacing is supervised by the depth sensor, its display being located at the service boat or via water acoustic communication channel from the shore.
The signal buoy consists of cylinders of variable sections, providing a platform for deployment and protection of the control and monitoring complex of the cage. The size and weight characteristics are adjusted to provide survivability in the regime of extreme weather conditions. It can operate afloat at wave (force 8-9) and respective wind speed. It also can freeze in ice (up to 50 cm) to stay for winter. Flexible pipelines and electric cables coming from the signal buoy to the cage and supplying compresses air and providing power supply. Additionally the buoy includes the antenna for an underwater acoustic control and monitoring system with an operation range of 10 km. Safety is provided by flashing beacons and corner reflectors, also from the feed bunker.
To install the cage at the water area (in a depth of up to 50 m), it is equipped with a special system of anchorage, consisting of anchor ties (i.e. a chain with a variable running mass) and 3 anchors (weighing 3-10 t), providing reliable functioning of the system under weather conditions given. The anchors are not included in the delivery, but are made on site (by the customer according to the drawings given). The anchorage system is designed for each particular site depending on hydro-meteorological conditions and depth of an installation site.
The net chamber with a volume of 1.000 to 2.000 m3 is preferably built from our polymer covered polyester net (mesh size 20, 25 or 40 mm) but could be changed to a kapron or nylon net too. The net chamber is placed within the steel structure at special guy ropes, running up and down from the platform. The guy ropes are fastened to the feed bunker and the net chamber. To provide for harvesting of fish, the net chamber is equipped with a device, consisting of a rope system and portable hand operated winch, raising the bottom edge to the surface. To remove wastes from the net chamber it is equipped with a special tray device which is lifted to the surface by the help of winches.
It is possible to position the cage system in a depth range in the water column of 4-40 meter. Afloated the system withstands waves (with personnel to force 3) without personnel to force 6 and waves up to 6 meter. Submerged it is resistant to force 9 and respective wind speeds and waves up to 8-9 meter.
The axial diameter is 20,12 meter and the light displacement is 16,2 tons. Total height (including 2.000 m3 net chamber) is 12,1 meter, the minimum draught (at launching) is 0,8 meter and the maximum draught (including 2.000 m3 net chamber) is 8,6 meter.

We also produce traditional cage systems of any size, based on our pontoon system.

SUBMERGED AND ILLUMINATED NET CAGES for the fingerling production with natural zooplankton

20 years' experience in the field of global plankton research and fingerling production with natural plankton and years of tests under different environmental conditions in marine and fresh water, are the basis of the new "UWG- Solar cage system".

The production method is based on plankton feeding in the natural environment like: lagoons, bays, fjords, lakes and large ponds, by means of attracting the organisms using a lamp located in the centre of fine meshed submerged nets. Mainly Copepods and Cladoceres - but also a variety of other zoo plankton are photo sensitive and steadily swarm into the cages towards the light source.

The net cages 2x2x2 m (8 m3) are manufactured from highly resistant mono filament polyester fabric (with mesh sizes 0,3 to 1,8 mm), is fitted with a zipper for easy access and a conduit for the electric cable. The net cage is stretched onto a strong stainless steel or aluminium frame. An efficient solar generator is supplied for remote site operation. An electrical transformer can be supplied in order to reduce voltage to safer levels for use with water.

Depending on the zoo plankton populations, the fish stocking density (from the fry stage to fingerling size of 5 cm length) can come to 5.000 Ind./m3 and survival rates of more than 90 % have been achieved with various marine and freshwater fish species.

Operation and maintenance is limited to:

1. Functional control of the system,
2. Periodic cleaning with a portable high pressure cleaner, in order to prevent clogging effects,
3. caused by detritus, algae and faeces,
4. Observations of the plankton development in the location.

The system is environmentally safe since:

1. No feeds or fertilizer are applied,
2. Construction materials are inert,
3. Plankton consumption is minimal and does not affect the natural stocks.

POLYMER COATED POLYESTER NETS for cages

This special polymer coated polyester net is very strong and stable, but also flexible. The nets are 100 % stronger than conventional nylon nets, are highly UV-resistant, suitable for seawater and need no antifoulants. They need less maintainance and have fewer escapes than nylon nets. Nets having been in use for more than 10 years still look like newand save a lot of total operation costs! The material is available on coils with a width of 3,6-3,8 m with a mesh size of 5 and 12 mm, and 5 m wide with a mesh size of 20, 25, 40 and 100 mm. With a weight of 450 to 780 g/m2 the cages need no lead sinkers. We deliver finished cages or also the material on coils.

Specifications:

All data on average (+/- 10 %).

NYLON NET MATERIAL for cages and fishery

The production is based on a complete process, from the raw material, passing the different manufacturing phases like: matching, weaving, cutting and packing. Our aim is to assure a quality product to the customer. Woven in 6 nylon, all our nets are machine sewed with double or triple rows of stitching. A cord protrudes at the end of the corners, forming the eyelet (that holds a nylon ring) which is anchored to the floating structure. On request the bottom can be supplied with lead cords of various weights or the frame can be further strengthened by means of polyester cords that are hand welded to increase the level of resistance, in cases of exposure to severe weather conditions. The finished nets are delivered in any shape or size with a mesh size of 4, 5, 6, 8, 10, 12, 15, 18, 20, 25, 30 and 35 mm, or only the material.

We deliver also seine- and gill nets in various sizes.

PRECISION CLOTHS for aquaculture and hydrobiology

This fabric program includes precision sieves of different material strengths and offers a narrow mesh grading between 20-2000 micrometer and therefore fulfils all requirements of today's aquaculture and hydrological needs. Appropriate sieve fabrics are offered per running meter and as standard or customised products, such as filter-, dip-, hatching-, cage- and plancton-nets.
In Austria a catch of zooplancton for the production of fry and fingerlings is commonly practisized since more than 50 years. During the last years several important optimisations are archived allowing a better net construction and easy catching. With appropriate designed plancton nets, harvests of several tons per day can be achived. Thank's to this Austrian development of special sieve-net-systems, it is possible to grad the plancton in 3 different size classes during the catch. The result is the correct plancton size for all development stages from fish larvae to fry and fingerling. An expensive and complicated indoor-production of prey organisms (such as: Algae, Rotatoria, Artemia, Daphnia etc.) is not necessary.

SHADING SHEETS AND NETS to protect fishes

Shades are made from UV-stable polyethylene material and protects fish and ponds from light and birds. The sheets are available on coils from 1,5 and 3,0 m width and are manufactured with extra strong hem and eyes. For pricing always the width of the coil is calculated.
We also supply "extra strong" mono filament polyethylene shade cloth (roll width 3,5 and 5 m) and other shade cloth materials and nets at very reasonable prices, just let us know your requirements.

We deliver also bird protection nets with a mesh size of 15 - 150 mm.

TRAPS made of plastic material

This easy to handle and maintenance free plastic traps have been tested in practice and are suitable for both professional and sport fisherman. Features such as a new shape and correct colouring are the result of fishing expertises. A favorable price/performance rate ensures highest economy in use. Of course the traps are saltwater and corrosion resistant and also resistant to crabs and other pests. This traps (with exchangable components) have an inlet opening of approx. 42 cm and an integrated bait basket in the closed end cap. The traps are specially suitable for catching eels, but can also be used for other fish species as well as crayfish. This traps are delivered complete with plastic covered iron spits (12 mm Ø) for submerging, which guarantee that the trap is allways positioned with the upper closed side on top, which in turn created a protection shelter for the animals.

The following versions are available:

Eel-trap: 1-throats, approx. 1,0 m long, weight 2.4 kg
Eel-trap: 2-throats, approx. 1,4 m long, weight 4.2 kg
Crayfish-trap: 2-throats, approx. 0,6 m long, weight 1.0 kg

We also deliver trap nets and all other fishery nets.

NET CLEANING SYSTEM with high pressure

This netcleaners maintain a flow of oxygenated water through the nets, that keeps them clean with minimal disturbance and no need to remove the fish from the pens. It's construction and design make the washers head working toward the net against its own high pressure water stream and can be used on all types of nets and cages. The netwasher loosen and pulverize, with its high pressure waterstream, algae growth, food remains and other fouling, which in turn will drift away by the current. The single head disk is easily used, the dual head disk is for faster cleaning.
The fuel driven pressure pump with high output drives the head of the netwasher disk or can be used for pressure washing. It can be operated by one man from the boat or walkway/collar or underwater by a diver.
Alternatively a hydraulic power pack for workboats is available, which is permanently installed with all the advantages of hydraulic drive, useful for pressure washing on boat and cages.

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Recirculation Systems

The requirement for seafood continually rises worldwide, and product is continually becoming more scarce. Aquaculture is a young, innovative part of economy with high growth rates and secure prospects. The future of fish production requires water to be used as economical as possible, and environmentally safe removal of waste products with lowest possible energy consumption. Demands of environment legislation reduce possibilities of open water fish production more and more. Already existing fish farms are confronted with directions for purification of their waste waters.
This accelerates the development of intensive, water saving systems for fish production which do not depend upon natural environmental factors. Production in a closed water systems offers more a compact growing environment for fish, low shared personal costs and good profits.
In such systems the waste water, which is loaded with metabolic by-products, is recycled through biological and physical purification and more than 90 % re-used. Through improvement of the re-circulation and filter technique we are able to offer an very efficient, easy and cost effective system for fresh and seawater. Risk minimization, process control and fish health are factors considered in our designs and re-circulation systems are produced in module-construction. Each module is an autonomous working system and is therefore the water is not transferred between modules. Depending on system size and customer wishes our systems will be supplied with modern measuring, regulation and security technique and working accessory.
Depending on the requirements (production capacity, conditions and species) we offer generally two systems:

RECIRCULATION SYSTEMS for nursing and holding

The modules for nursery and holding are available for a yearly production-capacity of 1-2 t (125-250 kg standing crop) and consists of 2 square and 1 filter tanks with the needed technique and equipment. The water from the fishpools are cleaned through a particle filter to remove suspended solids prior to bio-filtration. The bacterial settlement for nitrification will develop on the packages of the reactor, mud will be removed through the current. Our bio-reactors have the gigantic settlement-area of over 900 m2 per cubic meter filter material and therefore we need only very small filter units. Through the introduction of fine air bubbles through a special aeration- and lift construction our systems work without pumps and therefore require less energy thereby reducing costs. Through compact construction, our systems can be installed any time and anywhere without rebuilding or extension expense.

RECIRCULATION SYSTEMS for the intensive production

The modules for production are available for a yearly production-capacity of 50 t/year (standing crop 10 t) onward and allow our customers to get familare with the technique and topic without high risks. The water from the fishpools are cleaned through a drum filter to remove suspended solids prior to bio-filtration, where the nitrification process and the aeration with oxygen takes place. From there the water is pumped to the fishtanks, wich could be adapted to customer wishes in form, size and number. The use of UV- or ozone is planned. This system is available for all fish species (also salmonids). Beside consulting and planning we offer also training and service as well as the seed (fingerlings) and if requested marketing, insurance, financing.

We deliver also bio-filter media (Biolox, Siporax, Riga etc.) or complete bio-filter systems.

HOLDING TANKS for fish and seafood

This proven RGP-tanks (isolated with polyurethane) are specially suitable for the holding of crustaceea and molluscs (like: lobsters and clams etc.). The units are delivered complete with in the bottom integrated mechanical-biological filter (Lithothamnium calcareum) with pre-filter, titanum-chiller (R134) with digital display and thermostate, UV-C and recirculation system with PVC-pipes. They are build for a electric connection of 380 V/50 Hz (230 V on request) and a working temperature of 5-25 degree C.

The following models are available:

HOLDING AQUARIA for display

An aquarium should be seen as a complex grouping of elements functioning synergetically to maintain constancy of environmental characteristics, countering any variation whatsoever and simulating as far as possible the whole biological cycle that is present in nature and indispensable to the live of the aquatic animals. This futuristic range of aquariums are designed for a working temperature of 10-30 °C and consists of single or double glass walls in which the two layers of glass are separated by a dry air gap. The aquaria are available in different sizes (LxWxH 100-150 x 70 x 50 cm) with or without external mechanical/biological filter, pump and climatisator (heater/chiller) with UV-C unit.
Additional, single wall glas aquaria (200-600 l volume) with stainless steel frame, on request.

POLYESTER TANKS in all forms, sizes and colours

A long proven history (30 years) in pools and tanks manufactured of glass reinforced plastic (450 g/m2). The conical form and funnel shaped outlet and absolutely smooth inside finish ensure the system is practically self cleaning. Therefore it is possible to hold sensitive bottom fish or fish larvae. The whole pool and especially the edging very strong, allowing attachment of automatic feeders or other equipment.
Optional laminated feet make it possible to place the pool safe on any bottom and ensure easy lightweight handling or transportation. The pools and tanks are available in different sizes and types. The outlets are made from PVC - pipe (110 mm Ø) with water level regulation, which is fixed under the bottom and leaded at the pool side.

CIRCULATION BASINS for better production conditions

Our completely new developed "Circulation Basins" are between a rectangular tank and a circular pool. They summarize all advantages of both (i.e.: self cleaning, good flow conditions), but don't have their disadvantages (i.e.: bad water exchange, bad fish distribution). We recommend our new basins specially for recirculation systems to offer better production conditions to the fishes and to use the water more economically, but also for space and current loving fish species (i.e.: Salmons, Sturgeons).
We recommend a width/length relation of 1:3. Every basin has therefore two bottom outlets and should have also (two) inlets, thereby. A central seperator (middle wall) divides the basin in an endless canal.
We offer various models from our "Circulation Basins", which are made from Glassfibre Reinforced Polyester (GRP) and which are available in all colours of the RAL-scale.

CIRCULAR POOLS with liner

This pools can be placed in or on the round and consists of a 0.6 mm strong galvanized iron wall which is painted inside and plastic covered outside. The lower and upper bottom- and hand-rails are made of strong plastic to ensure a long selflife. Inside the pools are lined with a 0.8 mm strong PVC liner with exact fitting in black colour (on request also in blue).

The following sizes are available:

We deliver also just the robust and soft PVC pond liner in a thickness of 0.5 to 1.5 mm in the colours black, green or blue, on coils with a wide of  2-8 m and a length of  15-50 m, or as finished liners in any size.

FILTERCHAMBERS with swirl seperator

This new compact filters are used specially for holding units and garden ponds and are very effective for the fine and raw filtration. The system can be operated by gravity or pumps and can be placed into the ground or stands free. A long inlet opening secures that the water in the vortex rotates slowly, so that the larger waste particles are traped in the center of the bottom. The build-in flow channels force the water to flow trough the filter media (i.e.: Filter brushes, Japan matts, Sinter glas, Aqua rock, Bio balls, Poly foam etc.). The waste particles concentrate at each cone, where they can be removed reularely by opening of a gate valve. The models are made from reinforced galss fibre polyester and are delivered with cover and outlet pipes. They are available with or without filter material.

The following Center-Vortex models are available:

On request also row-vortex filters with 3-5 filter chambers are available.

SAND FILTERS for high comfort

This sand filters are made of reinforced glasfibre polypropylene or polyester and available in various sizes, heights and types.
The filter units with high performance are available as single systems with or without distribution cross and outlet valve, manometer (with automatic and/or manual air removement) or also complete with pipes and ready for connection (230 Volt/50 Hz) with 6-way backwash valve, selfpriming filterpump (with large debrits collector in pastic) mounted on a noise reducing plate made of plastic. The special filter sand is available as accessoire.
An automatic backwash system is available for all modells and guarantees high comfort and safety.

The automatic heat filter systems are available with electric termostate, control unit with timer and the back wash system is equipped with a heat exchanger.

DRUMM FILTER with high cleaning capacity

This drumfilters for the mechanical cleaning of medium to heavy loaded aquaculture or industry waste waters are made from stainless steel and are available complete with filter frames and screens, cleaning pump, electric control and with or without installation tank.
The filters are available for flow capacities of 8-750 or 7-500l/sec (at max. 10 mg or 25 mg load per liter), with filter screens from 20-100 µm, and a filter area of 0,5-13,76 m2. The energy demand is 180-750 watt and the water demand for cleaning is 0,13-1,10 l/sec at 2,5 bar.

The following types are available:

Filtercapacity in liter per second at 25-10 mg/l in suspension.

PROTEIN SKIMMER for aquaculture and aquaria

This protein scimmers have a good dimensioned volume of the reaction- and foam tube. A special injection unit generates a vacuum, where air is succed in and distributed in fine bubbles. In seawater the single bubbles have a volume of 0,065 mm3, a surface of 0,785 mm2 and a diameter of 0,5 mm. Each liter air generates therefore a total surface of 12 m2. A rotating (patented) nozzle system cleans the foam tube and the foam collector. Over a valve (optional automatic) water cleans the nozzle sytems. A regulating system allows to operate the scimmer also under extreme differing situations of water column.
The optimal retention time is about 2 min., if the flow rate is increased the retention time decrease.

The following types are available:

We deliver also ozone generators with a capacity of 1-1000 g/h.

HEATERS AND CHILLERS for aquaria and aquaculture

This compact (CE-certified) heating and/or cooling systems can be used for various liquid media (also seawater or foods) and are very save and secure in operation through the missing direct contact to the media. An electronic control via a high precision thermostat and the continous display of the temperatur via a digital thermometer allow an easy and exact control of the temperature. An ecologic chooling gas (R 134 a) and a low power consumption are features of this transportable and easy to install systems. The standard connection is 230 Volt 50 or 60 Hz. Systems with integrated UV-C System, higher capacity or other voltages are possible on request.

The following types are available as standard:

WATER DESINFECTION with UV-light

Ultraviolet light (UV) destroys microorganisms by changing their genetic information (DNA), but does not produce residual or hazardous by-products, nor does it affect the tast, odor or colour characteristics of the treated water. It is light with very high energy levels and wavelength of 200-400 nanometer (nm). The most effective ultraviolet light for desinfection is UV-C (200-280 nm), specially with a wavelength of 254 nm.
The heart of the UV systems are high-performance spectrotherm lamps (low pressure technology) which provide a stable UV output through a wider temperature range. This special spectrothermal lamps show higher degrees of effectiveness and stability than other conventional lamps. They also exhibit a high UV power output (up to three times more than competitive low pressure lamps) and long operating live (12,000 h), resulting in decreased overall costs. The efficient lamps have a high UV emission in the area of the effective wavelengths (254 nm), that makes it possible to destroy more than 99.99% of all pathogens in water. To further increase efficiency, reliability and service lifetime, electronic power supplies (ballasts) for the lamps where developed. In addition, the new electronic ballast replaces several components required in conventional systems, reducing overall electrical cabinet size and heat transfer requirements.
Electronic controllers containing smart chips are designed specifically for the lamps and increasing effectiveness. These can vary the supply of energy to the lamps as a function of water quality and flow rates. They ensure that optimal levels of ultraviolet rays are emitted in the effective wavelength range and at the same time, they ensure low energy consumption. Consequently the lamps have much longer life expectancy than conventional lamps. In addition, calibrated sensors, monitor and document all factors necessary for desinfection and provide superior wavelenght selectivity (>99% at 254 nm), minimal drift (± 2%) and long service life. Upon reaching a present limit, the UV systems automatically signal that cleaning is necessary. If required, additional functions, such as ultraviolet dose indicators, automatic cleaning and remote monitoring via telemetry and the internet, can be integrated.
By studying various reactor geometries with respect to the UV intensity distribution and hydraulic characteristics, specific reactors types where developed to provide effective desinfection while minimising overall power requirements. Our systems have a modular design, which enables us to draw up solutions that are specified to our clients' needs in all areas of ultraviolet desinfection for up to sereral m3/h. This systems are characterised by their high desinfection performance, combined with compact construction and low energy consumption. Depending on the application, also special ranges are available that can be easily integrated into existing systems. The control panel indicates and measures important operating parameters such as UV intensity (mW/cm2) in the water. Alternatively, the UV dose (mJ/cm2) can be calculated and displayed if a flow signal is provided.
The UV systems are produced according to high internal quality standarts. The entire electrical assembly is constructed in accordance with European industrial standarts (e.g.: VDE, DIN, EN). By passing stringent tests, this UV systems have been approved and certified by various independent authorithies (e.g.: ÖVGW, Austria).

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Aeration Systems

INJECTION AERATORS for aeration, circulation, destratification and oxygenation

This injectors are one of the best and most advanced aeration systems worldwide, and also suitable for large ponds. They work with an for endurance run produced, maintenance free, turnable, submerged (also seawater resistant), motor in different power sizes (1.0 HP 230 V/50 Hz or 1.5-2.0 HP 380 V/50 Hz). The rotating propeller (2800 r.p.m.) produces an adjustable current, through which air drawn from the surface and formed into fine evenly distributed bubbles.
The diffused air aerate from the bottom up and the circulation created from the fine bubbles displaces the surrounding water, thus breaking up stratified water areas. This constant surge forces the pond to turn over, bringing cooler bottom water to the surface, where it picks up additional oxygen from the atmosphere. Therefore the dissolved oxygen is always as high as possible. Through the eutrophication process (of faeces and feeds) there is usually oxygen deficit at depth, therefore this system works to an adjustable depth and introduces the oxygen where it is needed, not only on the surface. If submerged, pure oxygen instead of air can be introduced with exact dosage. Long contact time of the fine bubbles in the water, ensures also this system is very effective.
Depending on power and depth, the air flow rate is up to 35 cubic meter/hour. At an oxygen content of 6 mg O2/l at beginning, one 1.0 HP unit in use with air, introduce over 0.32 kg O2/h which is the oxygen demand for over 2600 kg (table sized 250 g) trouts at a water temperature of 10 °C, for approx. 1000 kg at 20 °C or up to 3000 kg of other species.
Depending on installation, depth and current, sediments can also be cleaned. If the aerator is positioned near the water surface it also acts as an ice clearing machine in winter. Strong circulation also eliminates pond stratification and organic matter deposition. Finally thanks to the floatation phenomenon (foaming), this aerators make it possible to remove excess algae proliferation, colloidal substances, mud and any other suspended particles and improve water quality. With this proven system, all variants of aeration, current creation and oxygenation are possible.
Theese proven aerators are made in China and are supplied complete with motor, supports, float kit and propeller protection fingers, but are not available for delivery to: Portugal, Spain, Italy, France, Belgium, Danmark, Germany, Great Britain, USA, Mexico, Thailand and Taiwan. They are lightweight compact systems (Motor: 14 to 16 kg), and very easy to install.

^{INJECTORS without further energy consumption}

This "ECO" injector is a new developed static aerator for the water inlet pipe (1 ") in tanks, raceways and small ponds, that works hydraulically and has no moving parts. It is designed to ensure cost-effective use of any viable water source. For degassing, aeration, oxygenation and dosing with chemicals (thereby avoiding the slightest wastage and maximising efficiency). In enriching the water with air or pure oxygen, this aerator can create good circulation with a lesser ammount of water than is usually supplied, with consequent energy savings. It works hydraulically (from 0.2 bar and 0.4 l/sec. on) exploiting the act the water passing through it at high speed (achieved by means of suitable flow rates and pressures with the special 3 interchangeable nozzles (for approx. 30, 50 or 100 liter/minute) and creates a great pressure drop and consequently a tremendous suction capacity, without introducing additional energy. If no pressure is available it can be connected to any pump.

^{PROPELLER AERATOR with horizontal spray pattern}

This propeller aerator was specially developed for intensive production of fish in tanks, raceways and ponds. The maintenance free, heavy duty, motor (230 or 380 Volt) has a mounted propeller which allows a high water circulation and has an oxygen transfere rate of approx. 1.5 kg/kwh. The small float size (70 x 70 cm) as well as the compact and lightweight system make it fast and easy to install.

The following typs are available:

As accessoire a protection basket (with 4, 7 or 12 mm grating) is available, which save smaller fish for injuries. Additionally a water conveier for the suction of deeper water can be build to specific deepts.

AERATOR PUMP with fontain spray pattern

This "Spray" aerator pump with 25 m cable is specially suitable for ponds and introduce a lot of oxygen into the water. If the self floating pump is connected with the spray nozzle it becomes an aerator with fontain spray pattern. If the supplied nozzle is changed to the supplied pipe adaptor it can be used as a floating pump for irrigation. The change of theese two functions doesn't need any tool. They have a very reasonable price and are easy to install, eighter floating on the water surface or submerged to any depth (with an anchor stone).

The following typs are available:

SCREW AERATOR with filter for energy saving operation

This "Quirl" aerator is a completely new developed system for tanks or small ponds. With an energy consumption of only 3-8 Watt the aerator has a water circulation capacity of  up to 60 l/min and moves it from the ground over the water surface. The aerator (CE certified) is operated between 3 and 18 V DC eighter with the supplied transformer (with 10 m cable), or directly with the supplied 10 Wp photovoltaic module (35 x 60 cm). So that the water is aerated and pass the filter material (2 kg) thereafter. It acts therefore also as a biofilter, pH-stabilistator or phospor eliminator. If less or no filter material is used, the form and height of the water splash can be adapted (from approx. 20-50 cm). For the suction of water from deeper water layers, the 30 cm long suction pipe (DN 100) can also be extended.

PADDLEWHEEL SYSTEMS for effective oxygen introduction

Aeration and/or oxygenation is specially of economic importance in intensive farms. At this completely new developed systems all possible failures and defects of other known products have been removed. The systems have been tested under hardest conditions and have a very high effeciency, with the same time low investment and operation costs. The oxygen introduction is usually about 1.6 kg/kwh. There are no bearings of the wheel (100-130 r.p.m) necessary and also no couplings and discs, this reduce friction lost and increase the effeciency and also reduce the possible parst which could become deffect with time. A very long self live and high efficieny is also guarandeed through the worm-gearing. The motor is specially sealed aginst moisture. Paddles, wheel and frame are made of stainless steel, the floats from thick UV- and ozone resistant material. The Paddlewheel Aerators are available in different power ratings (180, 250, 370, 550 and 750 Watt) and have dimensions of approx. 1.5 x 1.6 x 0.6 m (LxWxH) and a weight of 30-70 kg.

To use this paddlewheel aerators also with pure oxygen instead of air, as accessoire a special oxygen cover is available. The special formed cover inside guarantees that no oxygen (feed up to 15 l/min) disperse or waste to the surface, after the water leaves the aerator. As there are no seals necessary at the bearing of the wheel, also this guarantees that there is no oxygen wasted and thus this makes the system very effective too. The efficiency is up to 90 %.

RUBBER DIFFUSER with stainless steel frame

This professionell, extremely durable and effective diffusers are suitable for the live fish transport and for emergency purposes with pure oxygen. The approx. 1000 pores/meter arranged in 6 rows, of the special oxygen hose open only if oxygen is supplied and close again if the supply stops. Thus, pore blockage is prevented and the diffuser is allways ready to operate. An uniform bubble size due to the streight hose mounting in a stainless steel frame are main features of this professionell diffusers. The sturdy hose connection is 6 mm as standard (and is also available in 9 mm if prefered).

The following sizes are available as standard:

Other diffuser sizes and forms on request. For the self production of diffusers we deliver also just the diffuser hose per meter (19 mm inside diameter) as well as end pieces with connector and the pressure hose per meter (6 mm inside diameter).

CERAMIC PLATE DIFFUSERS for micro gas bubbles

This diffusers are robust engineered products with high specification and performance and perhaps are the most efficient diffusers available. The ceramic plate has been designed to be very strong, the thickness (approx. 12 mm) of the ceramic has been increased over the more conventional plates. The pore size is also only 0.3 microns which produces a cloud of tiny oxygen bubbles (10-200 microns) in the water. Depending on the gas (oxygen or ozone) and water chemistry, the diffused gas may pass directly into solution with no visible sign of bubbles. There is no better gas diffuser available.
The ultimate in flat plate ceramic gas diffuser. One Typ 300 diffuser will supply sufficient oxygen to supply 100 % of the oxygen demand of approximately 1000 kg of fish with an efficiency approaching 100 % transfer of oxygen into solution and a oxygen satturation in the water of over 120 %. In seawater applications it can actually be difficult to see the bubbles, since the gas goes almost directly into solution.
The ceramic flat plate diffusers give a very small bubble size and are used where a small high rate diffuser with a high oxygen transfer efficiency is required. The working gas pressure is 25 to 35 psi, do not exceed 50 psi as it may result in damage to the diffuser.
The flat plate ceramic diffuser all have a female BSP threaded inlet with hose adapter.

The diffusers are available in the following sizes:

FLEXIBLE GAS DIFFUSERS with high performance

This is among the most robust and versatile fine bubble diffusers commercially available. The diffuser has the capacity to pass large quantities of air, oxygen or carbon dioxide with low pressure drop and small bubble size (approx. 1-4 mm). Fine bubble diffusion is inherently more effective than coarse bubble diffusers in providing a greater mixing action and aeration efficiency. The diffusers are of a tubular semi-flexible construction (32 mm in diameter). An outer polyester sleeve encases a silica particle ballast and an inner nylon distributor. The internal ballast is not fused together, therefore precipitates such as iron and carbonates tend to crack off, and can be flushed out easily. The internal ballast (weight approx. 1.6 kg/m) means that the diffuser does not need to be anchored to the floor of the tank. The unique design of the diffusers makes them largley resistant to biological and chemical fouling. The diffuser resolves many of the problems associated with other diffusers and has proven itself with over 10 years of use in many industrial and wast water treatment applications and it is the leading air diffuser for aquaculture. This gas diffuser is a hybrid air diffuser with the benefits of both tubulare membrane and solid air diffusers, but with few of the disadvantages. Solid diffusers can breack or become blocked by biofouling, iron and carbonate precipitation. Membrane and other tubular difussers have to be secured to the tank bottom. The membranes (elastomers) can also suffer from fatigue, and as a consequence the performance can rapidly tail off over a few months.
The diffusers are sized (up to 5 m in length) according to the flow (m3/h) of air to be used. Length is approx. 33 cm per m3/h air or liter oxygen/min flow rate and pressure drop is less than 1 psi. All diffusers are supplied with either 3/8", or 1/2" hose tails in acetyl plastic. Brass or stainless steel fittings and non return valves are also available.

PROFESSIONAL CERAMIC DIFFUSERS for air

The fine poored ceramic tubes allow to diffuse the air in fine bubbles. The diffusers should be installed in the same deepth, but as deep as possible below the water surface. The floating cross diffuser is placed on the water surface in the center of the tank or pond and fixed with a rope to the shore so that it can move a little and aerate a larger area.

The cross diffusers are available complete with 20 mm hose tail (other on request) and are delivered with or without float. The 1 m long feeeding tube is also available shorter. Each diffuser tube has a length of 18 cm and a diameter of 6 cm and can introduce approx. 1.5 to 2.0 m3 air/hour each (6-8 m3 per cross diffuser). They are also available as self sinking single tube diffusers with hose tail.

REGENERATIVE BLOWERS for pressure or vacuum generation

This reliable and favorable blowers summarise modern know-how of pressure and vakuum generation, based on longtime experiences. The motoris constructed for endurance run is available in various power sizes. Concerning the compact dimensions and the low sound this blowers are easy and everywhere to install. Lateral channel blowers work regeneratively. Casing and impeller with radial blades form a circular body. The medium (air) is accelerated by centrifugal force in the blade channels, stocked and compressed. This process continues permanently with continually increasing pressure rising until the medium leaves the casing through the outlet connection. Because of the special principle of construction and design, there is no contact between rotating parts.

Our unique submerged air blowers are installed directly in the water and allow therefore shorter pipe-lines, resulting in lower oppositions. This submerged blowers are nearly noth to hear and also save space. The waste heat from the submerged blowers can be used to heat the water in warmwater recirculation systems, which is an additional advance.

The blowers can be installed single, paralell or for increasing the pressure, also in rows. At special request, all blowers can be produced for seawater use or other electric frequencies. As accessoire air filters, sound absorbers, pressure valves and stands for the blowers are available.

Types with the following performance data* are available as standard:

*Performance data at pressure operation 50 Hz (= 2900 RPM), for gas at 15 degree C, weight 1,23 kg/m3, pressure 1013 mbar, tolerance +/- 10 %.

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Analysing Systems

CHEMICAL TEST BOX for the water analysis

This Compact-Laboratory box set is equiped with liquid colour analysis tests of: Oxygen (Demand + Dissolved), Hardness (Total + Carbonate + Residual), pH-value, Ammonia, Nitrite, Nitrate, Phosphate, and Temperature.

All tests ar also available as single or replacement units and additionally test sets for: Aluminium, Arsen, Lead, Chlorine, Chloride, Cyanide, Iron, Calium, Copper, Magnesium, Manganese, Nickle, Sulfate, Sulfite, Zink, Zinn etc.

DIGITAL PHOTOMETER for various water parameters

For the necessary manual analysis, this microprocessor photolyser meter with professional concept and high precision is the right coice. Just select the required program on the foil pushbuttons. The display shows the parameter and dimesions exactly (to 2 digits behind the got). An acustic sign informs when the reaction time is finished. The results are displayed on the meter and can be stored for later processing. The meter is equipped with a  RS-485 adaptor. Via an additionaly integrated RS-232 adaptor the meter can be connected to a printer or PC (cable as accessoire available). It is possible to archive over 500 stored data sets with date and time for up to 16 tanks. The meter has a 0-point-memory, which needs no new calibration. This photolyser works with 4 usual 1,5 V batteries, with integrated capacity monitoring on the meter. Alternativly accumulators or an connector for external power supply is available (as accessoire).

Reagenzia/Measurement:
Aluminium 0-0,5 mg/l, Ammonia 0-0,5 mg/l, Bromine 0-10 mg/l, Chlorine 0-5 mg/l, Cloride 0-250 mg/l; Copper 0-1 mg/l, Hardness 0-500 mg/l; Iron 0-5 mg/l, Manganese 0-0,03 mg/l, Nitrate 0-100 mg/l, Ozone 0-1 mg/l, Phosphate 0-4 mg/l, pH-value 6-8 and Acid-potential 0-5 mmol, etc;

SATUROMETER to identifie gas super-satturation

This new handheld saturometer (Protection class IP65, with electric backlight display identifies gas super-saturation in water reliably to 400 hPa resp. mbar pressure difference, with an accuracy of 1 hPa. It works with a usual 6 x 1.5 Lithiumcells, with integrated capacity monitoring on the meter. The maintainance free sensor is copleatly sealed (Protection class IP67, Signal outlet 0-5 V). As option also an oxygen sensor can be connected to the meter.
The gas bubble disease is very often present undetected and leads to significant damage in the fish stock. If fish are being exposed to oversaturation continuously, they will suffer from it no matter which gas contributed most to the supersaturation! In experiments it was proven, that a continuous charge with only low levels of supersaturation has a significant negative impact on the fish immune system. A fishstock infected with IPN (Infectious Pancreas Necrosis) produced losses of 10-15 % after 90 days whereas fish from the same stock epxosed to supersaturation showed a mortality rate of 65 %. The gas bubbles themselves cause a lot of direct damages like lesions and embolies. Those alone are lethal in some cases. But in every case they open the door for secondary infections which can not be repelled by a weakened immune system. Another typical sample is a trout breeder who reported fin rot and saprolegnia on the fish body. Measures showed a gas pressure of 45 hPa which equaled to 105 % gas saturation. It may not sound high but the pectoral fins were severely damaged by gas bubble lesions. The fin rot and fungus (Saprolegnia) were clearly produced by an undetected gas oversaturation.

We deliver also moisture meters.

PROFESSIONAL MICROPROCESSOR METERS fo