I added rocks a week ago and my P's and my pleco have been hiding behind them ever since and i noticed my pleco went missing around the same time? so yesterday i was doing my weekly water change when i was dumping the water into the tank it poured water into a crack pushing the pleco out. i was like holy sh*t. that fish looked like it has been dead for day's. nasty as sh*t all rotten and white fungus on it. it had it's parts coming off from it's body and it smelled like complete sh*t when i pulled it out. but i was wondering if my water quality is ok since that's been in there? my water had a burnt smell coming from it before the water change. also did my p's kill it? there only baby's and have no teeth?