I feel like this is sorta my fault. I purchased a male betta for my mother about a year and half ago. She was taking car of changing the water. Lately I've noticed that she hasn't. I've asked her a couple times if she plans on changing the water, she said she was going to. Well tonight I told her she could put it in my 29 gallon since I don't have any fish that are agressive and wont nip at it's fins. Well I went to look at the betta and couldn't find it. So I found it laying under the heater that is used. I thought it was dead initially but after touching it, he started to move. His cuadual fin has rotted and he looks pretty bad, and his pectoral fins were clamped So I Changed all the water since it was probably an ammonia waste pool. Is there anything else that i should do? Thanks, Jim