Okay...this is my second betta fish. My first I had for about three and a half years, a crown. This one I got about two months ago now, and he's a veil. The tank is 2.5 gallons, has a skull cave, has plants, bright colors, even floaty plants for hiding. I do have a filter, but he doesnt seem pushed around by it so I figure it's okay.
But starting three weeks ago when he was in a cool basement and left alone a lot, I noticed he had nibbled his fin. The plants aren't sharp enough to catch it I think, and just now after I thought he was getting better (his tail fin growing back) I see him turning in circles and getting at his lower fin.
The pH isn't crazy, and I can't do much right now to change the temperature of the tank, which is averaging 29-30 degrees celsius (84-86 degrees farenheit). Its just so hot out.
I've tried changing his scenery, being in the room more often, even tried changing up his feeding schedule a little so there's not quite a routine to his day.
What else can I do?? Or is he simply that kind of betta?