fish in the wateraeration fish in the wateraeration


LINN Gerätebau manufactures a very extensive range of floating water aerators!
Due to the large number of different device types - each still available in different motor power ratings - an optimal adjustment to the water body and to your pond system can be made.

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oxygen enrichment for vivid fish in the water oxygen enrichment for vivid fish in the water

Oxygen enrichment

LINN Gerätebau is one of the pioneers for the use of technical oxygen in fish farms! Our OXYPLUS introduction system has been offering effective possibilities for 20 years and our latest development LOXY offers oxygen enrichment of the latest generation! You too can test the possibilities!

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al lot of fresh water al lot of fresh water


LINN Gerätebau has been manufacturing tube pumps for the effective transport of large quantities of water in fish farms for many years. But even if this type of pump is not suitable for your application, we can help. We can design and offer the optimum pump for every application - just contact us.

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Fische in einem Kescher Netz Fische in einem Kescher Netz

Fish transport

LINN Gerätebau manufactures various transport container systems from 30 to 1,400 litres capacity with all the necessary accessories for gentle transport of your fish!

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Abwasserbelüftung in einem Teich Abwasserbelüftung in einem Teich

Waste water aeration

LINN Gerätebau manufactures stationary and floating wastewater aerators from 0.35 to 4.0 kW for oxygen enrichment in wastewater. The devices take over the mixing of the wastewater and the necessary oxygen input.

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Fisch wird gefüttert Fisch wird gefüttert

Fish feeding

Continuous and even feeding is important for the growth of the fish. These are important factors for water quality and feed quotient. The feed conversion of the increasingly high-quality feed is a decisive factor for the growth of the fish and thus for the success of the farm.

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Die Teiche von LINN aus der Luft Die Teiche von LINN aus der Luft

Monitor & control

LINN AQUA-CONTROL - the life insurance for your fish! To protect yourself from unpleasant surprises and to increase safety, it makes sense to install a system for monitoring and alarming. Safety is provided by the constant monitoring of the oxygen content by means of electronic probes directly in the pond.

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Fische in einem Kescher Netz Fische in einem Kescher Netz


We also supply useful equipment such as water disinfectants, landing nets, drain strainers, cleaning guns ... and much more! From practice - for practice!

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Fish farming technology from the Sauerland all over the world!

LINN Gerätebau has been involved in equipping fish farms throughout Europe for 50 years. Based on the experience of the own trout farm, which has been run by the Linn family since 1929, equipment for daily practice has been developed again and again, which has become established on the market and then often belongs to the necessary technical standard in fish farms.

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Product of the month

energiesparend &

Solarinsel kleiner
Solar island

new solar module - generates electricity for your water aerators!

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Our products

Over 1100 products from the areas of water aeration, waste water aeration, oxygen-enrichment, pumps, fish transport, fish feeding, monitoring-control, accessories and spare parts.

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Aqua-Control 2.0 - Fischzucht-Monitoring next Generation

Aqua-Control 2.0


Would you like more information?
Watch our video - it explains the basic things about our software!

LINN Fish Farmer

The ultimate management software for complete fish farms.

Read more: LINN Fish Farmer

NEW in the LINN range

Handy Polaris C
Handy Polaris C Optisch

Das bewährte Sauerstoffhandmessgerät - jetzt auch mit optischer Sonde

Solarinsel 10 Watt
Solar Island 10 Watt

Small 10 watt solar module for operating 12V feeders


Latest aerator development: extremely economical motor - speed-controllable direct drive

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Vario Wheel

solar-compatible - extremely economical motor - speed-controllable direct drive - matching solar island available

Ceramic oxygen diffuser

New ceramic diffusers - effective oxygen input, low maintenance!

LINN Online Shop

LINN Online Shop

Visit our online shop - order quickly and easily with a few mouse clicks!

Our extensive product range is available to you around the clock - including necessary spare parts and lots of accessories for hobby pond keepers and professional fish farmers.

This shop is a practical addition to our proven services. We would like to offer you a contemporary solution for ordering urgently needed equipment or spare parts around the clock and on all days of the week. Our well-known good service quality is of course still available to you!

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Popular products from LINN

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Profi-Automatic Feeder 5kg

The LINN automatic feeder for brood rearing, but also for use with ornamental fish, in the hobby area and in the koi pond! The original, at an unbeatable price!

Wasserbelüfter Aqua-Hobby

Aqua-Hobby is used thousands of times. This type of unit offers effective aeration at a super price-performance ratio.

Aqua-Control One Überwachungs- und Steuerungssystem für eine Messstelle/einen Teich

Monitoring and control system for a measuring point/pond

Sauerstoff-Eintragssystem Loxy

The latest generation of oxygen supply systems - made by LINN! Proven thousands of times in fish farms all over Europe!

Proven accessories - order immediately

Our accessories for fish farming offer practical additions to our articles.

Galvanised peg

Practical bracing material for fixing all water aerators


proven Söll/Oase pond care products against algae and sludge

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Harvesting nets - rectangular

indispensable in every pond system - professional landing net!

Cleaning pistol

Accessories for cleaning and disinfecting

LINN - since 1929!

From the experience of our own trout farm - which has been run by the Linn family since 1929 - come the ideas for our devices, which are then further developed until they are ready for series production.
Many devices enjoy patent or utility model protection.

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