Is there anything else that can resemble mouth fungus? I have 2 threadfin rainbows that have a bit of white stuff around there mouths, one of them with a bit of stringy stuff. Its kinda hard to see because these fish have such bloody small mouths. I put them in a sick tank and medicated for a few weeks until i ran out of medicine. Then I waited and waited and waited. 3 months later they are still sitting in the sick tank happy as can be with a little bit of white stuff around their mouths. Sooo is there anything that can resemble mouth fungus? Most of what I've read makes this infection sound very serious but nothing seems to be happening. I've been thinking about putting them back into the regular tank but didn't want to risk infecting others if they are in fact sick. Opinions?