I just read this whole thread- just want to say we all have things happen to pets that we blame ourselves for. At least we are trying our best to learn and move on and not make the same mistakes. I wish you good luck with your new one! I lost a platy a couple weeks ago and I didn't think it would make me feel that bad but I cried because I thought she suffered . ... I am sure I did something wrong but I never figured it out. So . .. basically I'm saying it happens and try not to feel too bad anymore. Just learn and move on, think of it as using your experiences to better take care of your new pets in the future. :)