Aquaculture Technology

  Cage Systems deutsch

Pontoons - Cages - Nets - Boats


Maritime Technic - Pontoon SystemMODULAR FLOATING DOCK SYSTEM for aquatic sports, aquaculture and environmental protection

25 years experience in "state of the art" flotation 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 utilizing the friction co-efficient achieved by independently controlled flooding of the 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 individual modules are easy to handle (weight: 6.2 kg) and have a very high load capacity of 360 kg/m2 (=75 lbs./sq. ft.). They are made of a high-quality synthetic, UV-stabilized and anti-static material (green or blue), which is extremely resistant to the elements. Individual blocks measure 50x50x50 cm (1.65x1.65x1.65 ft.) and the standard freeboard is approximately 40 cm. Blocks are easily assembled (with an assembling wrench) by joining the connecting lugs with bolts that give a secure and stable connection.
These building blocks can be assembled to meet any desired layout or dimensions, 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 utilized throughout the year or the modules can be stacked and stored. Unlike closed floats, this system does not blow up in the sun and is resistant to attacks from Teredinidae.
Unlike conventional wooden floats, the pontoons are made of a skid-proof material, and will not rot or develop sharp edges, or expose rusty nails etc. The "Maritime Technic - Pontoon System" contributes to water purity and is aesthetically pleasing. It has lugs (ears) along the sides where different accessories can be fitted and anchoring systems attached.

Swimming ladders safety rails, anchor fastening and and boat -mooring-eyes are the main accessories, with options such as side screws and bars as well as fenders, ropes and anchors. If needed, access ramps and gangways can be produced to the customer’s design. For marinas electricity distributors (w/wo illumination) and water supply-systems are available.

More infos and photos

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CIRCULAR NETCAGES for all conditions

Circular NetcagesWe supply a wide range of single, double and triple ring cage collars, using black high density polyethylene (HD-PE 100) pipes in various thickness (SDR 22-11) and sizes from 200 to 500 mm Ø, optional mounted with either dip galvanized steel or injection molded plastic brackets (mounted usually every 2-3 m). All build with heavy gauge handrail and upright pipe (110-160 mm Ø) to resist deformation. The tailor-made circular cages or pens with a diameter from 10-60 m or 30-200 m circumference can be prepared for all types of weather and sea conditions from sea-bay to offshore sites and are developed for industrial farming of various fresh- and seawater fish species (i.e.: Kingfish, Cobia, Tuna etc.). A safety chain inside the outer pipe ring and polystyrol cylinders or dividing plates welded inside the inner pipe ring, are available for safety reasons. A full circumference walkway decking is available optionally. A bird net stand, a dead fish collector and a sinker tube ring are available as accessories. The cage pipes are shipped in parts and are welded on site. The following diameters are recommended:


Floats Railing
<20 m 200-250 mm 110-125 mm
20-40 m 250-315 mm 125-140 mm
>40 m 450-500 mm 140-160 mm

Square net cages of any size we produce with our:

Pontoon System


Illuminated submerged netcagesILLUMINATED NETCAGES 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 center of fine meshed submerged nets. Mainly Copepods and Cladoceres - but also a variety of other zooplankton organisms are photo sensitive and steadily swarm into the cages towards the light source.
The 2x2x2 m net cages (8 m3) are manufactured from highly resistant mono-filament polyester fabric (with mesh sizes 0,3 to 2,0 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 aluminum 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 zooplankton 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.
The operation and maintenance is limited to the functional control of the system, a periodic cleaning with a portable high pressure cleaner, in order to prevent clogging effects, caused by detritus, algae and faces, and the observations of the plankton development in the location.  The system is environmentally safe since no feeds or fertilizer are applied, the construction materials are inert, and the plankton consumption is minimal and does not affect the natural stocks.


UNDERWATER LAMPS to delay maturity and increase growth

LED underwater lampThis new underwater lamps with LED (Light Emitting Diode) are especially energy saving and have a long service life (approx. 30,000 hours). They are used successfully in both fresh- and seawater, either in the night to attract various aquatic organisms (like zooplankton or squid), or during the winter for the simulation of daylight (24 h/day) to delay maturation and increase growth (up to 10-30 %) in several fish species (like Salmon or Cod etc.). The professional lamps are available with different light colors: blue (approx. 40 lm/W), yellow (approx. 60 lm/W), green (approx. 80 lm/W), or white (approx. 100 lm/W = Lumens/Watt), whereby optimal to attract zooplankton (copepods, phyllopods) is blue light (around 450 nm), to attract squid, shrimp and fish in seawater is green light (around 500 nm), and to attract fish in freshwater is yellow light (around 600 nm). To simulate daylight, sometimes blue - but better white light is used, whereby blue light penetrates furthest in water but white light comes closest to the natural light spectrum and can be used for all or general purposes. The recommended power in white LED light (4,000-6,000 Kelvin) is about 1-3 Watt/m2 of the holding unit (tank or cage). The self-sinking and water-proof (IP68) lamps can be used for a water depth up to 10 m (1 bar) and a water temperature up to 30 °C. They are made from high quality plastic and stainless steel (AISI316), with LED's (SMD 3528) placed on 4 sides for a 360 degree lighting angle, which reaches up to 5 m (depending on water turbidity). This submersible lamps are delivered complete with a fixed cable (5 m) and are available for 12 V/DC with two crocodile clips.







140 W

200 W

300 W

400 W


420 pc.

600 pc.

840 pc.

756 pc.

Size (ØxL)

8x37 cm

8x39 cm

8x46 cm

8x48 cm


2.0 kg

2.5 kg

2.6 kg

2.8 kg

Simpler and cheaper LED underwater lights (10-70 Watt), on request!


Dual head netwasher in useNET 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 water stream, 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 net-washer 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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This special polymer (PVC) coated polyester (PET) 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 antifouling. They need about 90 % less maintenance and have fewer escapes than nylon nets. The live-time of this nets with continuous use in fresh water is up to 30 years. The material is available on coils with a width of 3,6 m with a mesh size of 5 mm, and 5,0 m wide with a mesh size of 20 and 40 mm. With a weight of 450-790 g/m2 the cages need no lead sinkers. We deliver finished cages or also the material on coils.

Nets with the following specifications* are available as standard:





Square mesh size (open area)

40 mm

20 mm

5 mm


490 g

790 g

450 g

Tensile strength (ISO 13934-1) Warp/Weft

45 kN/m

90 kN/m

40 kN/m

Expansion force (ISO 13934-1)

20 % 20 % 15 %

*Specification data on average (+/- 10 %).

Polyester Nets (PVC-covered) MS 5-40 mm


NYLON NET MATERIAL for cages and fishery

Nylon Nets (knotted or knottless) MS 4-30 mmThe 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 high resistant nylon, all our nets are machine sewed with double rows of stitching. UV-antifouling protection or coloration, on request. The finished nets are delivered in any shape or size with a mesh size of 4, 6, 8, 10, 12, 15, 18, 20, 25 or 30 mm, or only the net material itself.

Seine Nets in two designs:
Seine net with bag - consisting of two wings and respective bag in between, for the catch of fishes in lakes, rivers and ponds etc.
Seine net without bag - consisting of a well vault single wall, for the harvest of fishes in ponds, raceways and tanks etc.
Both nets are complete ready to use mounted in strong ropes, with foam floats and lead sinkers.

Gill nets in two versions:
Single or triple sheet gillnets with a mesh size of 6-150 mm, in various heights and lengths.
Both gillnets are available loose or mounted ready to use with lead and float line.

Trap Nets in two outfits:
Fish traps - with one troth and three galvanized iron rings, as well as two wing nets each 1,5 m long.
Fish bags - with two troths and five iron or plastic rings, as well as two wing nets each 2 m long or a 3 m long guide net.
Both nets are complete ready to use. Longer wing or guide nets with floats and sinkers are possible.

Cast Nets in two arts:
Traditional art - the lower line with harvest bags, which catch the fish.
Yugoslavian art - the lower border will be formed to bags by ropes during lifting.
Both nets are complete ready to use and have a circumference of about 7 m, a height of approx. 1,7 m and a mesh size of 11 mm as standard.

Scoop Nets in two forms:
D- or O-formed strong, corrosion free scoop frames (wide 40-70 cm) with protection and preparation for handle.
Both nets are complete ready to use mounted with net bag (mesh size 4-20 mm), and a handle (length 1,3-1,7 m) from hard-wood as accessories.

We deliver also other nets in various sizes.


PRECISION CLOTHS for aquaculture and hydrobiology

Precision woven screening fabric is a highly specialized monofilament fabric, characterized by precisely defined and controlled, consistent and repeatable material properties s.a.: mesh size, thickness, tensile strength, dimensional stability, cleanliness etc.). This fabric program includes precision sieves of different material strengths and offers a narrow mesh grading between 20-2000 micrometer and therefore fulfills all requirements of today's aquaculture and hydrological needs. Appropriate sieve fabrics are offered per running meter and as standard or customized products, such as filter-, dip-, hatching-, cage- and plankton-nets.
In Austria a catch of zooplankton for the production of fry and fingerlings is commonly practiced since more than 50 years. During the last years several important optimizations are archived allowing a better net construction and easy catching. With appropriate designed plankton nets, harvests of several tons per day can be achieved. Thanks' to this Austrian development of special sieve-net-systems, it is possible to grad the plankton in 3 different size classes during the catch. The result is the correct plankton 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.) can be replaced.

Plankton nets in use Copepodes under 500 micrometer cloth



Shades and nets are made from UV-stable polyethylene material with a shading density of 30-85 % to protect fish and ponds from light and birds. The sheets which let water (from rain) to drain off, are available on coils from 1,5 and 3,0 m width and can be manufactured wider with extra strong hem and eyes. For pricing always the width of the coil is calculated.

Shadding sheeds and protection nets (shadding value approx.: 85, 75, 65, 50, 45, 30 %)

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


TRAPS made from plastic

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 coloring are the result of fishing expertise's. 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 exchangeable components) have a wide inlet opening 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 sinker weight for submerging, which guarantee that the trap is always positioned with the upper closed side on top, which in turn created a protection shelter for the animals.

Eel-trap 2-throatsCrayfish-trap 2-throats

The following versions are available:

Version Throats Length Weight
Eel-trap 2 1.5 m 4.2 kg
Eel-trap 1 1.0 m 2.4 kg
Crayfish-trap 2 0.6 m 1.0 kg

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ALUMINIUM BOATS for fisheries and watersports

This multi-purpose boats are made of 1-3 mm thick seawater resistant aluminum, welded with modern technologies (WIG-Argon und Plus-ARC) and need no coating or antifouling. The integrated floats secure this boats are unsinkable. As accessories the following is available: Stand with steering, Build-in-tank, Electro-outfitings, Swimming ladder, Reeling and Persenning etc.
The smaller recreational boats Type A (from AlMg3) are made in multi parts and can be divided for transport (to 125x135x55 cm) or also extended on demand by additional body modules. They are verified by Lloyd's Register in Hamburg and have the EU-conformity certificate (CE-Module-D).
The larger working boats Type C (from AlMg4,5Mn) are made in single parts. They are verified by Lloyd's Register in Hamburg and have the EU-conformity certificate (CE-Module-C).

Typ 230A - 350A - 480A Typ 610C

The following types are available as standard:

Type 230A 350A 480A 470C 610C 750C
Length: 230 cm 350 cm 480 cm 470 cm 610 cm 750 cm
Width: 135 cm 135 cm 135 cm 180 cm 180 cm 180 cm
Height:   48 cm   48 cm   48 cm   75 cm 75 cm 75 cm
Weight: 45 kg 60 kg 80 kg 250 kg 300 kg 400 kg
Loading: 200 kg 250 kg 350 kg 450 kg 600 kg 800 kg
Parts: 2 3 4 1 1 1
Motor (max): 6 PS 10 PS 15 PS 40 PS 60 PS 80 PS


INFLATABLE BOATS for fishery and recreation

This well designed and large dimensioned inflatable boats are build from a very strong (blue-grey) plastic material, according to requirements of todays customer preferences and use. The good quality workmanship and materials guarantee security and longlifety, also in seawater. The large diameter of the hose, the reinforced heck plates and the keel forms, allow the boats even with minimal motorization and low speed, good gliding, high floating capacity and enormous stability. Security and safety is provided by the bars with broad profile on the sides and keel, by the valves situated inside, as well as by the security and holding ropes on top. The sturdy handles situated outside and the self lending valve inside allow easy handling and working.

The models S of the "Sport Serial" (excl. 200 S) are fitted with a wooden floor with aluminum frame (aluminum floor on request), and strong switchable rowing supports with stackable paddles from aluminum. A wooden bank with fixing possibilities, holders for the persenning, bag and reparatory sets are standard outfits.
The models P of the "Professional Serial" are fitted with a fixed bottom hull made from grassfire reinforced polyester with deep V-formed keel, an integrated driver stand with reeling and window, as well as single seat in the middle and double bank in the back. A self-lenting anchor box and closable storing boxes are standard outfits.
Packing bags, heck wheels, bathing ladders, seat banks (also inflatable) etc., are available as accessories.

Modell S Modell P

The following models are available as standard:

Model Length Wide Weight Hose Ø Chambers Motorization Capacity
200 S 200 cm 134 cm 24 kg 35 cm 2 max.   3 HP 260 kg
230 S 230 cm 134 cm 29 kg 35 cm 3 max.   4 HP 290 kg
305 S 305 cm 149 cm 45 kg 40 cm 4 max. 10 HP 470 kg
335 S 335 cm 149 cm 55 kg 43 cm 4 max. 15 HP 560 kg
380 S 380 cm 179 cm 69 kg 45 cm 4 max. 25 HP 670 kg
430 S 430 cm 192 cm 79 kg 50 cm 4 max. 40 HP 830 kg
460 P 452 cm 201 cm 220 kg 47 cm 5 max. 60 HP 630 kg
520 P 514 cm 230 cm 280 kg 52 cm 5 max. 60 HP 720 kg


ELECTRO MOTORS for boats and pontoons

Electro motors (shaft, screw and flange models)For boats, an electro motor is practicable for up to 9 m total hull lengths. Electric motors have, compared with petrol motors, different turning moments, which allow to use electric motors with relative low powers. Longtime experiments have proven, that the required power relation (electro to petrol motor) can be 1:2.0 to 2.5, if the petrol motor was not over motorized for the boat and the use. All models have a compensated row motor, which coiling compensation optimizes the energy usage and increase the output of the motor, specially at higher turns. The casings as well as all supports are made from marine aluminum (GalSi5Mg to DIN 1725, pp. 2), which is corrosions and seawater proof. All other materials incl. all screws are made from stainless steel. The ball bearings are made for long operation and live and the seals of the bearing are made form seal rings. All parts are covered by plastic or special paintings for additional protection. Motor and motor casings are also painted with antifouling. All parts are built with high precision and each motor will be tested to electric performance.

The outboard-shaft models have a weight of 19-21 kg and are delivered with integrated cable, switch and fuse. They are ready to use and just have to be mounted on the heck and connected with the cables to the battery. Available in 3 power sizes (500, 800 or 1.400 Watt) with 4 steps (2 front and 2 back) and with different shaft lengths for various boat types.
The inboard-flange models have a weight of 15-35 kg and are delivered with complete cables, switch and fuse. They must be installed on the boat and are fitted with a pin, where linking ropes can be fixed. Available in 4 power sizes (800, 1.400, 2.000 or 3.000 Watt) with 4-6 steps (font and back).

A foldable propeller, which brings the wings into a position so that they doe not turn if the motor is not used, is available as accessories. Additionally, special batteries for long time use with high cycle stability, battery loaders, and (from 36 V on) a steeples motor regulation is available.

We also deliver all other nets and traps for commercial fishery!

Recirculation - Incubation - Feeding - Aeration - Monitoring - Processing - Equipment

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