I'm still figuring these fish out but I've learned a few things along the way. Adding a catfish to an above ground pond keeps the fish more active. adding "safe zones" for baby fish helps a lot more of them survive. A "safe zone" could be an old bird cage, a bunch of pond weeds, piles of sticks, and pretty much anything else that would be easy for a small fish to get through an hard for a big fish. I'll post more later I gotta go.