AERATION
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LINN aqua technology Germany – technology from the Sauerland to all over the world! For 40 years we have been manufacturing effective equipment for fish farming and aquaculture companies – but for many years also effective and economical eration technology for the waste a water sector. In addition, municipal en terprises, city administrations, zoological gardens or golf clubs belong to our large clientele. As you can see, the field of application for our equipment is large! We continue to draw the ideas for our equipment and technical develop- ments from our own trout farm, which has been family-owned since 1929. A greater practical relevance is hardly possible! This pays off for our customers – we know what matters – water is our element! Our economical production facility with modern machinery ensures the high quality standard of our equipment. Several hundred units per month now leave our production facility in Sauerland and are delivered all over the world. We sup- ply customers in more than 70 countries all over the world. Test also the know-how of LINN Gerätebau – the leading European manufacturer for machines for water aeration and o xygen enrichment of fish farms and aquacultures (award of the IHK Südwestfalen)!

AERATION – Healthy ponds need oxygen! The oxygen in the supply water is only r arely sufficient for the fish population. This is especially true of ponds with little natural exchange of water. Here, aeration of the water is essential for the well-being of the fish. Pollution of the water by phosphates, nitrogen and dead plant material leads to over-enrichment of the water and excesive biological activity, known s as eutrophication. Like animals, green plants and algae use oxygen all of the time. However, during daylight, they produce more oxygen than they consume, through photosynthesis....

The aerators enrich the water with oxygen and expel waste gases (such as carbon dioxide). The water surface is broken by waves, thus inhibiting, or even preventing the growth of algae. In natural ponds, the circulation created prevents foul, oxygen deficient water. The water remains healthy. Healthy water makes healthy fish! In addition, all aerators offer a visually attractive fountain attern. The range of p sizes means that there is an ideal aerator for every size of pond ! So, no energy is wasted needlessly by having an oversized aerator! Aqua-Mini, Aqua-Maxi, Aqua-Hobby are floating...

Aqua-Hobby with submersible motor The stainless steel submersible motor has been further devel ped and improved. o The high-quality mechanical seal guarantees long-lasting durability, during continuous operation. Aqua-Hobby submersible The motor of this model hangs under the well-proven square float (as used for the Aqua-Hobby). The surface area of the screen (stainless steel screen basket, stan- dard bar spacing 9.5 mm – also avail ble a with 5.5 mm bar spacing) has been considerably enlarged. This aerator is less prone to clogging, making it more reliable! Flow deflector for Aqua Hobby...

Aeration The angle of expulsion has been chosen so that waves move outwards from the aerator, distributing the aerated water throughout the pond. Stagnant, oxygen-poor zones are thus avoided. This flow of water away from the apparatus also ensures that the aerator always draws water low in oxygen from below, circulates it and enriches it with oxygen. A short-circuit flow is avoided by the angle of expulsion. Aqua-Pilz comes in two designs: with a surface motor and with a submersible motor. Both types are almost identical in terms of performance, oxygen enrichment and power consumption....

Aqua-Pilz with submersible motor With this type of aerator the motor is housed underneath the float and is therefore out of sight. The Aqua-Pilz with submersible motor is therefore also perfectly suited to natural bodies of water. When not in use only a small part of the attractive circular float (available in either light blue or leaf green) is visible. In addition to its excellent oxygen-enrichment capability this type of aerator, as a result of its uniform discharge, also provides a beautiful backdrop, for example in parks. LINN constructed the robust stainless-steel submersible motor...

Aeration The Aqua-Wheel aerator is available in a variety of sizes to suit individual requirements. Common to all sizes is the exceptionally buoyant float. With Aqua-Wheel, we have made ease of use a priority. Power from the motor is transmitted by a simple tooth belt drive (except the 0.25 kW, where a gear motor is used). This re sults in reliable ope ration, long life and minimal energy consumption. Aqua-Wheel is relatively lightweight, so making it easy to install in the desired p osition. Practical carrying handles are moulded directly onto the sides of the float. The wheels are...

Motor rating !Water flow speed determined at a distance of 8 m.

Aqua-Jet Aqua-Jet has a directable jet fountain, and creates a strong flow in the pond. Aqua-Jet is very easy to deploy and install. A fixed installation is unnecessary, as it is only required to anchor the aerator (using ropes or chains) to stop it drifting away (against the directional outlet). The robust submersible pump generates a powerful flow with excellent oxygen transfer. This water circulation strips waste gases from the water, including carbon dioxide, and thus discourages algae. The angle of discharge (trajectory) of the water jet is adjustable according to the desired flow,...

Turbo-Jet Water circulator with air diffuser for better water flow and more oxygen . . . Turbo-Jet enriches the water with oxygen and keeps it clean. Turbo-Jet operates silently below the water surface. The robust submersible motor with its directly driven propeller produces an enormous water circulation with r elatively low energy-consumption. The special action of the high-speed motorised impeller draws in air, breaking it into thousands of small bubbles. These fine bubbles are injected into and entrained in the water current where they have a long dwell time. This improves oxygenation of...