I have had my betta for about two years. It developed a fin problem. he accquired an off-white colored growth on the top of his fin. I treated it with ick stuff, now where he had the grouth his fit has a hole. Does anyone know what this was and if his fin will heal itself?
Yes, fins can regrow. You'll need to do small, frequent water changes (like 10% daily or 20% every 2nd day) to keep the water conditions pristine during the healing process. Melafix (at 1/5 the dose on the bottle) can help as well.
I don't know enough about doctoring fishies to say more about your fishie. Can you post a picture? I'm sure the experts will want to know more about your water conditions (do you test the water? what were the results) and how often you change the water and how much. Is you tank filtered? heated?
I'm sure someone with more experience will be along with more information. In the meantime, start with the water changes.