What would be the recommended minimum depth for a channel cat to winter over in SW Ohio? I have two ponds. One is 6' L x 4' W x 3' D with nothing but bull frogs in it right now. I need to get the filter running again, but this was my idea. Get small channels to grow out from now till mid spring. Some will go into a 1 acre pond, others go to other ponds for stocking, and keep a couple in the small pond probably becoming dinner at the end of next summer. Then just start all over again. Anyway, need to know if they will winter over in the 3' deep pond?