Hello, I've had an Otocinclus catfish for a few months and he started to get lazy and listless after a while. I know this fish is supposed to be pretty active, so I knew this wasn't right. I posted a thread about this tryed people's suggestions but over time he just got more inactive. Until, it got so bad he could barely move. This went on for a few days until he died and we could remove him. I wanted to help but I didn't know how, and google wasn't telling me anything. So we just waited for his death The water quality is absolutely perfect for this fish so it isn't that. If you think you know what it might be, plz do tell. I would love to know for future reference. Thanks for reading.