Remember, this pond had a windmill aeration system, and it was cloudy/low to non-existant winds for a 2 week period. The windmill aeration system is spotty in it's aeration here due to the intermittent winds. It doesn't help that it's 30' to the West of a treeline that is taller than it is, and has another treeline about 75' to the South that is taller than the windmills too. Maybe it was spotty enough that the fish never realized where the O2 was the highest because it wasn't continuous?
Maybe enough larger fish died and that reduced the O2 consumption so the remainder of the fish lived?
All I know is that I'm really puzzled why some RBT survived while about 1/2 of the HSB perished.
