Often there is more than one stress factor present. When fish are severely stressed all it takes is a little more and they start dying. That is why water quality is so important as it helps keep stress down. Bill is right likely not runoff. That does not mean that water quality is not adversely effected by runoff. In my experience chem runoff is not often the actual cause of pond fish kills.

Last edited by ewest; 07/30/17 09:05 PM.