One of my plecos dorsal fin has finally split. He has always had a small hole in his fin but now its split all the way down (now looking like two dorsal fins, if you know what I mean). Anyways, I'm not sure if he has had a case of fin rot or if it was just an accident. Also, I was wondering if an injury like this would heal? Oh, and the hole in his fin never looked moldy or icky, just like he was poked by a needle and it left a hole there.