I came home from work today and Fishie's caudal fin looks shredded!! I'm so upset!! I don't know what happened! There's nothing in his tank with sharp edges. Do you think he's biting his tail? I haven't seen him do it, but I don't know what else it could be. Fin rot looks different than a bunch of long, ragged tears, right?
What would make him start biting his fins if that's what he's doing? The only difference in his tank is that I just put a heater in a few days ago. It's been hot in my apartment so I hadn't needed one yet. So I put it in a couple of days ago. Otherwise, everything's the same.
Does it sound like he's biting his tail? It looks awful. I'm so sad.
How can I get it to heal quicker? Or how can I get him to stop biting it if that's even what caused it?