We have a 2 acre pond in south central IL. Over the last week we have been losing about 15 fish a day. Most of the fish are adult bluegill. We have also found 2 bass and one bullhead(which were not stocked, but somehow found there way in). We have a fountain that we run year round and we feed our bluegill. The dead fish have no visible marks on them and they do not appear as though they quit eating prior to their death. Our pond is bordered by a field, but we have no more than 5 acres of runoff from the field and the field has not been treated yet this year. We'd appreciate any advice or answers. Thanks,
Mike