초록 ▼

Raising food fish utilizing apparatus including a fish tank having a biological filter submerged in it, by recirculating water through the biological filter to remove ammonia, the water in the fish tank being intermittently recirculated and returned to the tank to add oxygen and the fish periodicall

Raising food fish utilizing apparatus including a fish tank having a biological filter submerged in it, by recirculating water through the biological filter to remove ammonia, the water in the fish tank being intermittently recirculated and returned to the tank to add oxygen and the fish periodically being fed until they reach marketable size.

대표청구항 ▼

Apparatus for raising food fish, comprising a fish tank for maintaining said fish in a volume of water bacteria-supporting water treating means submerged in said volume of water, said treating means having an inlet an outlet and a plurality of bacteria-supporting wall means extending between said in

Apparatus for raising food fish, comprising a fish tank for maintaining said fish in a volume of water bacteria-supporting water treating means submerged in said volume of water, said treating means having an inlet an outlet and a plurality of bacteria-supporting wall means extending between said inlet and outlet providing a plurality of horizontally extended unobstructed passageways having a minimum cross sectional dimension of about one centimeter for free flow of water generally horizontally therethrough in contact with bacteria supported on said wall means, said passageways being vertically unobstructed for gravity removal of sludge therefrom sludge collection means beneath at least a portion of said passageways, and water recirculation means for recirculating said volume of water through said fish tank and said treating means.