Noticed what looked like tiny little bit of fuzz at the end of my new betta's tail last night when I got home, figured it was fin rot and that i'd go pick up some meds today. When I got up (3 hours before the store opens), I noticed it was more fluffy, thought it might be fungus. I fed him later this am, absolutely no interest in food; and he looks as if his entire balk half, tail and body are now covered in fluff, and he is gasping at the surface (I moved an anubias leaf so he can rest on it near the surface, he's having trouble holding himself up). I want to go to the store, but if it's moving this fast it sounds more like colmunaris than fungus to me, but it looks just like a fungus! I don't want to treat him with the wrong stuff (he's a cup baby, and not the strongest fish around), is there something that would effectively treat both?