i was looking very close at fish, i have two one is all white, a total of 10 inches of fiosh in twenty tank, including tails, they look like they have dry skin around heads ,especially the white one, is this normal, then the one that floats alot has a bit of eith dark orange or slightly red around gills, but not the part they open it is more right after the eyes, toward gill opening, what could this be if i have never had new fish, plants or live foods, no white spots on them but this dry looking skin on white one and the color around gills of the floaty one , it is about half way from eye to opening of gill,