Physically, you would think there was no way. The impeller would make things too violent. And yet, it happens. I know a guy that pumps from a creek to maintain his water level. He has more GSF than BG and the creek is wall to wall GSF. How else could it happen?

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