Actually BarO did it, not me. It's just using energy stored in the pressure tank to throw anoxic water hard enough at the pond surface to break it up and agitate it.

I think BarO's system still need tweaked a little bit, that's why I want him to call me.

Actually I'm running a pretty sophisticated flow-meter on my pond right now and the O2 stays at or slightly above saturation at all moments througout the day. This should allow the fish to expend less energy satisfying metabolic needs and putting more energy towards growth.

Holding a redear sunfish is like running with scissors.