I have a 1/3 acre pond that has an average depth of around 8' this time of year. It is warmer than normal for this time of year but is not lower than usual. About a month ago I put 3 white amur in to control the weeds. I came home from a long weekend and found 10 hand sized bluegill and 1 decent catfish floating dead. I have never had this happen before in the 8 years I have owned the pond and the water has been much lower and I believe much warmer. It would seem to me the bass would be less tolerant of the heat and such and have not had any die yet. Anybody have any ideas on possible causes or solutions?