Method and apparatus for growing fish in a recirculating tank

Apparatus for providing an enhanced environment for supporting aquatic life comprising an open container containing a body of water, canopy means overlying a portion of the body of water in said container, means for maintaining a supply of oxygen in said canopy means, water recirculating means for recirculating water from said container through the oxygen within said canopy means to oxygenate the water and then back into said container, open tray means containing zeolite through which the recirculating water passes for removing ammonia from the recirculating water prior to being recirculated through said canopy means, and second open tray means containing a plurality of said open tray means of zeolite, said second tray means having an apertured bottom through which the recirculating water passes into said canopy means to oxygenate the water as the water falls back into said container.

Apparatus for providing an enhanced environment for supporting aquatic life comprising an open container containing a body of water, canopy means overlying a portion of the body of water in said container, means for maintaining a supply of oxygen in said canopy means, water recirculating means for recirculating water from said container through the oxygen within said canopy means to oxygenate the water and then back into said container, means for removing carbon dioxide from at least a portion of the recirculating water including manifold means having a plurality of holes through which the recirculating water passes, first open tray means located directly below said manifold means in spaced relation therefrom for catching the recirculating water passing through said manifold means after the recirculating water falls through open air to release the carbon dioxide from the recirculating water, and means for directing the recirculating water collected in said first open tray means to said canopy means.

A method of providing an enhanced environment for fish in an open container of water comprising the steps of positioning an oxygenated canopy to overlie a portion of the body of water in the container, and recirculating at least a portion of the water in the container through the oxygenated canopy to oxygenate the water and then back into the container, the step of recirculating including passing the recirculating water through vertically spaced trays having apertured bottoms for passage of the water therethrough.

A method of providing an enhanced environment for supporting fish and the like comprising the steps of providing an open tank containing a body of water, placing a canopy in overlying relation to a portion of the body of water within the tank, venting the canopy to allow the canopy to sink into the body of water and thereby displace air from the canopy, filling the canopy with oxygen which causes the canopy to rise relative to the body of water, and recirculating a portion of the water within the tank through the canopy to oxygenate the water prior to reintroducing the water back into the tank.

A method of providing an enhanced environment for supporting fish and the like comprising the steps of providing an open tank containing a body of water, placing a canopy in overlying relation to a portion of the body of water within the tank, filling the canopy with oxygen, recirculating a portion of the water within the tank through the canopy to oxygenate the water prior to reintroducing the water back into the tank, slowly rotating the water around the interior of the tank using paddle wheel means to cause large dirt particles in the water to accumulate at the center of the bottom of the tank, and periodically opening a drain valve connected to the center of the bottom of the tank to remove the large dirt particles therefrom.

Apparatus for providing an enhanced environment for supporting aquatic life comprising an open container containing a body of water, canopy means overlying a portion of the body of water in said container, means for maintaining a supply of oxygen in said canopy means, open tray means containing a filtration medium, and water recirculating means for recirculating water from said container into said open tray means, said open tray means having an apertured bottom through which the recirculating water passes into said canopy means to oxygenate the recirculating water as the recirculating water falls back into said container, said canopy means being formed by side walls extending downwardly from said open tray means into contact with the body of water in said container.

Apparatus for providing an enhanced environment for supporting aquatic life comprising an open container containing a body of water, canopy means overlying a portion of the body of water in said container, means for supplying oxygen to said canopy means, and water recirculating means for recirculating water from said container through the oxygen within said canopy means to oxygenate the water and then back into said container, said canopy means having peripheral edges in contact with the surface of the body of water in said container, said canopy means being supported in the water by a supply of air/oxygen within said canopy means, said canopy means including vent means which when opened, allows said canopy means to sink in the body of water in said container to displace air therefrom, and when subsequently closed, allows said canopy means to be filled with oxygen which displaces the water from said canopy means, causing said canopy means to rise in the water.