Walt, Kelly Duffie, when he was THE water and pond chemical guy with Estes Chemical, once posted a picture of himself spraying a DW covered pond. He said that it was impossible for fish to live in the heavy concentration. This stuff reproduces at high speed and is tough to totally eliminate without multiple chemical applications. Greg once told me about just how often (daily as I recall) it reproduced. I would bet my money that was the problem.

Your mention of doing incredibly dumb stuff hits pretty close to home. What was I thinking?

I doubt that I would cut the tree(s). I don't think it would do that much good. However, it might help in some small way. Sunshine is a pretty good DO generator.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa