Does the ripped parts have black or red edging on his fins? Then it may be fin rot. Treat with aquarium salt, 1 tsp per gallon, and perhaps stress coat to help repair tissue. IF it isn't fin rot, this should treat the bitten fins anyways. Increase water changes to 100% daily. Try putting something in the tank to help him focus on that and not his tail. Anything, some people have had success with ping pong balls.
For now, since you can't have the salts until next week, clean water should help plenty with the healing process.
Last edited by BetterBetta; 08-13-2011 at 11:27 AM.