Over the past week or so I have lost all but one CPD. Every day one or two would die. I did the med trio on the entire tank and they kept dying all week. I continued to feed normally half the week. This morning I fed the two that are left with my normal food, but had not been feeding recently and almost immediately the remaining adult CPD began the twitch of death and listing that was the sign I recognized all week at the sign that the fish wouldn't make it til the next day. Is it possible that my putting wet fingers in the food over a couple of months would cause it be poisonous? All other fish shrimp etc. have been fine??? I looked at the remaining food on a white plate and don't see anything obvious. I see all over the internet people loosing all their CPDs one at a time and so bummed this keeps happening to people. Thanks All! Chris