Last night I brought home a new Betta from my LFS, he seemed to be in great health at the store, and still seems to be doing quite well, the only problem is that he seems to have a bit of fin rot, just some brown spots at the very edges of his fins. Could this have been caused by handling when I bought him? Will it go away on it's own, as long as the water is clean/treated? I tested the water for ammonia/nitrite, etc, all are 0 at this point, and the water has been dechlorinated. Any suggestions would be appreciated, I want to see my new friend healthy.