3/4 acre pond, 10' deep, western N.Y.
I had some really nice bluegills in my pond, probably 40 or so real lunkers along with quite a few smaller ones, some perch and last fall I introduced 20 young lmb.
Ran the aerator 24/7 all winter, just like last winter. This spring it appears that every one of my big gills didn't make it. Just finished scooping them out of the pond along with a few smaller ones. Haven't found any lmb or perch dead.
I was thinking that maybe they were just old and over fed and without being fed all winter, they just couldn't make it. What scares me is tonight while scooping out the corpses, I saw a medium (6") gill dying in shallow water. He looked fine but obviously wasn't going to make it.
I tested the water with my little test kit and nothing seems to be bad, ph, nitr.,ammonia ok. Any ideas of what's going on and what I should do?
Oh, the water all comes from rain or a swamp out back like it always has and nothing has changed with that. No runoff from fields or anything.
