Aquaculture

Aquaculture often has higher than average stocking densities, feeding rates, waste production and as a result; a higher oxygen requirement. With many fish all requiring oxygen stocked in one area, available oxygen in the water must be sufficient to sustain the population. a less than optimal dissolved oxygen level runs a massive risk of large or total fish losses once the oxygen crashes. The physical act of feeding itself requires oxygen as uncomfortable fish do not feed. Waste products of feeding such as fish excretion or uneaten feed breakdown also add to the nutrient loading and all the biological processes involved require oxygen. Proper aeration is the essential lifeblood of a functioning aquaculture establishment which is why all fish farms have backup aeration in place. environmental conditions will also affect oxygen levels as higher temperature water has a lower oxygen saturation level while many pond biologicals and fish tend to feed more at these temperatures. Where it gets complicated is that there are so many aeration options available that will vary depending on the fish species stocked, budget, pumps used, volume, power sources available and maintenance schedules. Some of the options include sub surface diffusers, venturi, paddlewheels, jet aerators, splash aerators and circulators. Many trout farms like to use paddlewheels because of the fast flowing water suitable trout flow trout systems while intensive recirculating fish farms may choose to use diffusers or direct oxygen injection. If you aren’t sure what would be best for you and your fish, then contact us and we’ll get it sorted.

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