I think 50 adult catfish in a 0.4 acre domestic water use pond is way too many for relatively consistant clear water conditions of water visibility in the range of 3ft-6ft. If you are happy with water visibility of 18" - 2 ft then use 50-60 catfish. Keep track of how many you stock and please do come back here in 3 years and give us a water quality/clarity report.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management