I fought finrot with Keller about 3 months ago. Took 6 weeks. Then had relapse. Got past that. But he also intermittently bites. He has a poor immune system in the first place-a petstore betta- and takes forever to heal. I have some bettas that will get nipped or ripped and then will have fin regrowth start the next day. Not Keller. He takes forever. He's also very sensitive to my being away for the day etc. So just when he has some regrowth, he'll get stressed about something and bite. And I don't care that much about the way it looks, but I don't like to see him stressed, and it sets him up for infection.
Any advice for fin biting? He gets pampered the most of my 15 bettas. Lives alone in a 10gal with lots of toys. I don't skimp ever on his water changes, he's too sensitive to let his water get remotely dirty. He has IAL in the tank. Sometimes AQ salt for healing but I try to avoid it. He's very social and I do favor him, so he gets a lot of my attention. But the down-side of that is when I have to be away for the day or night he gets stressed or bored and bites. So I come back to him ecstatic to see me but with a chunk of tail missing.
I've tried different things to reduce stress or boredom when I leave, lights on, lights off, TV on, something beside the tank...
Anyone use a lava lamp? That would be my next attempt I guess. Any other suggestions???