Al,

I am sorry to hear about your lost fish. You didn't mention what type of feed you feed. For your BG it should be a feed specially formulated for predator fish.

The dead fish do look old to me and so I think it may be possible it was old age coupled with stressful environmental conditions that killed them. Because of stress, you saw them succumb in narrow band of time. There could be something else that you need to be concerned about but the fish look to me like they were already near the end of life.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers