Bought a crowntail betta for my young daughter to enjoy. It is in a 2.5 gal tank (smallish, I know). It seems to be doing ok, but has something on its tail-- it could be described as grains of salt look, but it is pretty good sized grains and there are no other unusual markings on the body.I'm trying to remember if we saw this on the fish when we bought it, but we definitely have noticed it for the past week. Anyway, I don't know how to proceed. It doesn't appear to be itching, it eats well, I just don;t want it to die as it is a replacement already and I don't want her little heart broken because her precious fish died again. We lost the original fish a couple of months ago. Many thanks for any help!