My Uncle's 1.5 acre farm pond in NJ. No water feeding it except runoff and a spring that runs only in springtime. It does get hot but also does not lose much water due to nice clay soil. Built 25 years ago and stocked with LMB and BG and fine until 5 years ago. We had not fished it in many years so were not sure when the fish kill was but we only found BG and tons of frogs - no bass. We re-stocked with LMB, BG and also tried some variety with pumkinseed sunfish, GSF (and some pickerel that we never saw again).

Well, it happened again just this week - we saw tons of dead bass of all sizes down to 2 inches and BG/pumpkinseed in the shallows - and sadly 7 large LMB around 20 inches long. Probably due to long weeks of hot weather. We see tons of 1 inch YOY bluegill swimming in schools now with no fear (they would be slaughtered by 3 inch LMB and GSF in the past). We saw no living LMB and just a few 3-5 inch sunfish swimming around now.

I guess it is time to re-stock and hopefully this pond is not jinxed as it was fine for the first 20 years and now has had two fishkills in 5 years. I am sure just bad luck as there is no other issues we know of other than increasing geese populations in the last 10 years which are a pain (they eat all lilly pads and other things I have tried to get growing for YOY cover.