I have a betta that had his tail fin torn, and he looks stressed from his new move. Although he definatly isn't acting stressed! He LOVES his new big home!
See my "Is My Betta Sick?" thread below for the whole scoop...
Well Iv never treated fin rot so I dont know how to fix it. Maybe you should do a search and start a new trend. However I do know that it is caused my poor water. is it possible to return the fish and do a fishless cycle?