Todays Update:
Manny seems to be his normal self. He still has the white on his fins, but as far as I can see it is still no worsening. He does see to be missing on scale on his side, but that does not seem to be bothering him at all.
If it is fin rot, what is the best treatment? I had considered adding some salt.
My concern with adding the salt is this: I have some Nerite snail eggs hanging out in the tank right now. Now, as you may or may not know, Nerite snails are not a-sexual like other snails and require a male for fertilization, which I do not know if I have. They also require brackish to salt water or they will die very soon after hatching. My concern is that at this time I dont really want them to hatch. So, if I had salt will it make my water brackish?