So, I recently went on a 3 day trip with my family to visit my grandparents for Christmas. In the mean time I asked my friend to come over and feed my fish. (I was kind of worried as she doesn't know much about fish.) I showed her exactly how I feed them and just hoped everything would turn out fine. (I mean a little over feeding or underfeeding for 3 days couldn't hurt too much right?)
Anyway, came home and all my fish were fine (if not a little hungry and Raphael was mad that I hadn't been there to turn his light on at all...) Except for my guppies. They are still swimming around happily and appear healthy except for their tails. One of my males tail looks almost as if someone had been chewing on the end. just some minor damage. One of my other males (lyretail) had the same thing as well as having a clean split down his tail that hadn't originally been there. One of my females also has this mysterious split. It looks almost as if someone just took a pair of scissors and cut their tails. The cut is clean and doesn't seem to be bothering them at all.
My question is, is this something to be worried about? I think I remember hearing of some disease where the tails would split apart like this. I guess either way how should I go about helping them heal? Should I place them in a hospital tank and heavily dose the hospital tank with AQ salt and stress coat?
On a side note, a day before I left, I had purchased a dwarf gourami and added him into the tank (no quarantine, bad I know.) I don't think he could have anything to do with it as he seems very timid and tends to avoid the guppies.
Thanks for your help :)