whats wrong, no other fish have it, my water params are fine, the look like bad scrapes?, my eclipse cats have finally reached 6 in and are out more, could they be bothering him at night, as yesterday it was only 1 or 2 spots, now this. someone said HITH, but this happened over night pretty much.
Please post water perameters, Ammonia, nitrite, nitrate, Ph, hardness if available and temperature. Hex can erupt over night then the white tufts will disapear. Post perameters and we'll start from there.