IMO if the GSH died slowly over a two week period, then I don't think it was due to a recent turnover event especially if the rain event occurred within the last few days and fish were dying before the rain. Generally if a turnover occurs with DO sag then the fish will all die at once. From you description the fish died over a 10-14 day period which is very unusual for a turnover fish kill. I would set a baited minnow trap in the pond or try feeding the fish some soft pellets and see if you can catch some remaining shiners. You may have a few still alive. If you have a few GSH alive my guess (reason) for the delayed deaths was handling - holding stress and hot weather. July-Aug is a very poor or worst time to be moving shiners. Move shiners with very good aeration, them not crowded, and when water temp is below 74F. I would try adding a few more shiners 24-60 again in September.

Last edited by Bill Cody; 07/31/14 11:13 AM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management