Global demand for fish is rising rapidly, placing a growing strain on wild reserves. Fish farming has the potential to meet this demand. To create optimum fish farming conditions, farmers need to ensure appropriate nutrition and prevent diseasend while protecting the oceans from further over-fishing. Note: The raw material also provides this picture in higher resolution, but it has not been retouched.

Sea Cages

Innovating oxygen delivery for efficient, on-demand oxygenation in sea cages

Please note  

As of March 1, 2019, this product/service was divested to Messer and retained by Linde as a condition to complete the Linde and Praxair merger.

Learn more about the divestiture

Sea cages are huge net constructions, floating in the sea and fixed to the ground with ropes. They are widely used for on-growing and fattening of all fish types, in particular sea bass, sea bream, salmon and arctic char.

Difficulty in treating fish in sea cages

The main advantage of this aquaculture model is that it eliminates the need for artificial water exchange and water treatment steps. On the downside, high stock densities increase the risk of disease, infections and parasites (such as sea lice) in caged fish populations. Treatment with medication and parasite repellents is not only technically very complicated, but also stressful for the fish. To administer drugs, sea cages have to be sealed with foil – which cuts off the water flow and oxygen supply. Additional oxygenation is thus essential during these medical or de-licing treatments. 

Environmental challenges can also create a need for supplemental oxygen in sea cages. Warm water, stagnant current or other unfavourable environmental conditions such as algal growth can result in temporary oxygen insufficiency. A rise in temperatures reduces oxygen solubility in water, for instance. This can compromise fish health and increase mortality.


Oxygen on demand for fish in sea cages

We have developed an innovative solution specifically to meet the need for oxygenation in sea cages. SOLVOX® DropIn is designed for easy handling and operation, making it ideal for de-licing or medical treatments in closed sea cages. Thanks to its compact, lightweight design, it can be easily operated. It eliminates the hassle involved in dragging perforated hoses across the cage floor, also increasing oxygenation efficiency thanks to its innovative dissolver and distribution system. SOLVOX® DropIn is also an effective standby solution to accommodate temporary or seasonal fluctuations in oxygen saturation levels.