Originally Posted by twolovers101
The rips make it look like he's tail biting...
And yes, I did see regrowth after the treatment, I think the reason why most people say they see regrowth during the treatment is because most people continue the treatment UNTIL they see regrowth. I didn't have the opportunity to do that because I had to leave town and had no one I could trust to do proper water changes with the meds, so I let it go on it's own, and I saw healing when I returned :)
As for the actual problem, I would think, after seeing the pictures, that it's tail biting, the fin rot I was dealing with looked quite different. Nova would develop small pin holes in his fins which would get bigger practically over night and the fin would dissolve around it. Do you see something similar with your betta? The black edges of his fins MAY be fin rot, but it looks more like biting to me :/ I don't really know much about tail biters...
If your betta ever has mild case of the fin rot you can and it better to treat it with extra water changes and aquarium salt. Unless it bad case of the fin rot and you need medications.
As for the tail biting you really also can treat with extra water changes with my tail bitter i really never had any problem i just do extra water changes and put stress coat to prevent infections and his tail heals pretty fast.
If you need instructions on the aquarium salt treatment let me know. Never follow the box instructions though.