I have a very very sad and horrible story. I had always wanted to get a pleco, I think they're super kool looking. One day I went to a fish place that I had never been to just to look around. They had so many plecos and big ones, I begged and was able to get one. I had asked the lady that worked there if the pleco would be safe from my big bullhead catfish and she said yes. Well I took it home and put it in my tank with the bullhead, still not quite sure on if the pleco was safe. Everything was fine for about a week, then I noticed the bullhead had some white marks on it, and naively I ignored it. One day I went down quietly to see the pleco because he would hide if he saw me and I saw him sucking on the catfish! The scarring on the fish had turned to open wounds and I quickly took out the pleco. The bullhead looked bad but he looked saveable. I got some meds and put them in but the next day he looked 10x worse. He had loose red skin hanging off of him all over the place. I still tried to save him though because I really loved that fish but he got so bad that you could see the bones in his tail. I found him floating in the tank one morning and I was devastated. I had never thought that the pleco would've been the killer, and I think back to that lady who said they'd be fine together but I cant help but feel a little resentment as well as total gut renching guilt...