Some seemed pretty fresh others stank pretty bad like they had been floating for a while. I'm not sure the water temp, but I still have some clarity issues I'm working out so the surface temp and the deeper temps are probably considerably different.
I've cut the food off for now to see if it keeps happening. I also have an aerator and the pond is well fed which also aerates the water so I really don't think it's an oxygen issue. It's weird though because it's just bigger BG. I don't even think the bass at their current age could even eat any of these they are so big.
