I killed my precious 2 months angel fish during a water change. He got suck into the siphon and the nylon covering the tube. I removed the nylon sock to give it a wash and saw something hard inside. It was him. Can't believe it. First time this has happened to me. I am usually very cautious and it is very sad since I was planning to buy a new tank just for him when I move out in 3 weeks.