Culture of Channel Catfish in a High Flow Recirculating System

An indoor recirculating system was designed to evaluate the effects of a high flow rate and a high filter to tank ratio on the carrying capacity of a closed system for channel catfish culture. Updraft and trickling filters with various filter media were evaluated. A net gain of 319 pounds, with a standing crop of 405 pounds at a density of 7.2 pounds per cubic foot, was obtained over a 142 day growing period.