Two ipr modules ( 4 cells ) installed and operating in an 11.5 acre pond. the 16 x 80 ft. raceways ( cells ) are made of formed concrete walls and floor. each cell has a water mover, west alabama. each cell holds 5,120 ft3 of water and is stocked with 30,000 ( 5 to 7/ ft3 ) catfish. yield at the end of the culture period is 22,000 lbs/ cell ( 11.7 lb/ ft3 ). fish survival is above 92% and fcr is 1.5.