A 1/2 acre pond 6' deep does not need to be aerated 24 hr a day unless it is fertilized or has a heavy, dead organic load (lots of leaves, dead weeds or algae). Run times will depend on type of compressor and diffuser size. MSU & DNR contend that ponds in MI are more subject to winter kill if less than 15 ft deep. Your pond is a very good candidate for winter kill and a weed factory. Think about rebuilding and deepening the pond if you are serious about raising fish long term.


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