Process and system for growing crustaceans and other fish

A process for growing crustaceans or other fish in a recirculated marine aquaculture system, comprising the steps of:

• housing crustaceans or other fish in a container containing a body of water, said container generally having a bottom and a side extending upward to a top edge located above an upper surface of the body of water;
• removing a portion of the body of water from said container for treatment;
• cavitating said portion of water to strip at least one of a biological byproduct and carbon dioxide from said portion of water;
• removing the at least one of a biological byproduct and carbon dioxide that is stripped from the body of water from the container;
• mixing said portion of water with air for oxygenation thereof;
• returning said portion of water to the body of water within said container;
• and
• maintaining a proportional characteristic of the body of water within a predetermined range, the characteristic including at least one of temperature, oxygen, carbon dioxide, ammonia, nitrite, nitrate, alkalinity or pH, and salinity;
• wherein said removing a portion of the body of water from said container for treatment further is performed by a pump submerged within the body of water to move said treatable portion of water to an elevated position above the upper surface of the body of water,
• wherein the mixing step is performed upstream of the cavitating step,
• wherein the cavitating said pumped portion of water step is performed by at least one propeller housed in a stand pipe, the at least one propeller having a tip diameter sized smaller than an inner diameter of the stand pipe, and
• wherein the removing, cavitating, mixing, and returning steps are performed by a single water treatment unit, the water treatment unit comprising the stand pipe with at least one first propeller adapted to pump said portion of the body of water and at least one second propeller elevated above said at least one first propeller and adapted to cavitate said pumped water, the stand pipe further comprising one or more laterally directed openings positioned above the at least one second propeller, said laterally directed opening adapted to receive and direct the cavitated, pumped water to fall to the upper surface of the body of water, where during the fall of the cavitated, pumped water air is drawn into an air inlet of the water treatment unit to mixed therewith.