A recirculating production system requires treatment of solid and dissolved fish waste in order to recycle the water for continued use. In a recirculating system only a portion of the fish diet fed is actually converted to fish biomass. 

Suitable methods of oxygen supplementation are application dependent and site specific.

The First Limiting Factor of Water Quality. Air breathing animals are used to air containing about 21 percent oxygen, whereas aquaculture is conducted in water containing less than .0001 percent oxygen (10 mg/L).

Incorrect pipe sizing all too often causes unsatisfactory performance. Friction is the culprit. As the volume of air passing through the piping increases, the pressure required to deliver the air also increases due to friction (think of it as wind resistance). Since most aquaculture type aeration systems utilize low-pressure blowers, it is critical that nonrestrictive piping be used.

Anyone who has worked with fish for a while knows that if you don't plan ahead, you won't be in business for long. 

An aerator's standard aeration efficiency (SAE) is an important consideration when comparing one aerator with another.

You know how you can tell what people know by the questions they ask? Well, we know that most people don’t know about watts.

We recommend carbon vane replacement at nine-month intervals to ensure trouble-free operation of your compressor.

Cost is one of the biggest considerations. This generalized chart should help to quantify the difference between using an air blower with diffusers and using pure oxygen with a water pump and oxygen saturator (oxygen cone).

Aspirators and agitators are the aeration devices most commonly used on hauling tanks when the stocking densities do not require the use of pure oxygen. Agitators use a small motor (normally 12V) to spin a paddle which is in the water.