Hello all, seem to be having a problem with my datnoids especially, although other fish in the tank seem to be scratching as well .... i have 6, 4-bar dats, and 2, 7-bar dats, and i've had them for 6 months .... all of a sudden i see them scratching against things, and the majority of them have a bluish tint to their eyes and their eyes seem somewhat cloudy .... some even seem to have like white head pimples occasionally .... fish are eating normally, just want to stop this problem before it progresses .... some fish have both eyes bluish, and others its just one eye, and a couple don't have any cloudiness .... none of my other fish seem to have this bluish tint, but 1 of my vampire tetra's also seems to have slightl cloudiness in 1 eye, and these pimple things occasionally .... anybody have any idea's?