I have a creamcicle molly that seams to have HITH. She looks fine like hte others, until you look at her head. The scales on her head are thick and kind of stand up and they look like they are pitted. Everything I have read says that it happens to oscars and other larger fish. Am I wrong, or is this right and I it happens to oscars and other fish most of the time? We have mollys, platys, swordtails, tetras, one very community-minded gourami, and one pleco. It's a 55 gallon tank with an undergravel filter AND an Aquaeon over the back water fall filter thing with activated carbon. We just treated with Melafix and Pimafix today because our gourami has a sore and one of the black tail platys has a sore. We have already treated for Ich once, about a month ago. One thing we did stupidly, this being our first tank, was to use a tank that was used for Goldfish and we didn't clean the gravel very well.