Hello, I got the Hoplo a long time a go. Over time it started losing all its fins, and I don't know why. It could have been my Red Tailed Shark, but I don't know. I know he nipped at him at first, but not to that extent. The red tailed shark doesn't nip anymore. This is a 29 Gallon. When they get bigger I am moving them to my 55, then after that, when they get full grown I move them to my 100. The Hoplo just squirms everywhere. It's sad, but at the same time he eats and still goes up for air. What should I do? I have treated the tank for fin rot multiple times, but his fins definitely won't grow back.