Thanks for the suggestion about a diffuser. There is no power at the pond, and I'd have to put a solar panel quite aways up the hill to get any sustained sun, and then run the wires quite a way back down to the pump. I have thought about it, but it seemed too expensive.
The track hoe started today, and looks like I may be able to get to about 15 feet deep over at least the center channel of the pond. Bedrock rules. So I'll make due with what I can get, and then if I have winterkill, I'll invest in the diffuser. Thanks all! Barbara
