Scott, water temps were 77/78 just below the surface, but the water was murky or stained.

Last Thursday, we had some heavy rains, and then the water got murky brown, and the fish kill started.

I would think maybe the heavy rains turned the pond over, but I can't see how we'd have such 'bad' water in the pond.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."