So, I'll give you guys a little background on my betta fish.
I got Bruce about 1.5 weeks ago and after about 7 days of having him he began to bite his tail. I know it is tail biting because there is no color at the tips and his tail went from completely fine one morning to completely shredded that same night.
Bruce is in a 3.5 gallon with a filter (Aqueon Evolve4). The filter output is quite strong so I have both the input and output completely covered with filter media. This has helped immensely and now he has a very weak current. I also drilled some holes in the filter tube to make it even less.
He has plenty of hiding spaces in the tank. Two anubias plants, a temple ornament (with hiding space), and a soft grass-like plastic plant. I also have half of an indian almond leaf in there. It's been in there for about two days now.
For his boredom, I tried giving him a ping-pong ball to float in the tank but he seems to pay no attention to it. He responded well to me putting a picture frame with photo next to the tank. He likes to look at it but this has not kept him from biting his fins.
I have been doing 50% water changes every other day and adding stress coat for every water change. I can't tell at the moment whether it's getting worse every day but for now, I can't really tell a significant change since I started doing the water changes/stress coat.
Is there anything else I could try to make sure that this doesn't happen again? Am I doing anything wrong? :( I'm afraid he's going to end up making it worse and possibly get fin rot.