Niko, I didn't really know what ich was, but occasionally newly introduced fish will develop the white spots as described in Mandy21's links and do the glancing at rocks thing and increase gill activity but it has always cleared its self. Could it be that the ich is present, like if your a little stressed or run down you seem to catch every cold going around? I under stand the cycle thing with the white spot, I just don't understand why no other fish in the tank doesn't contract it, and the one that does gets better with no intervention from myself.