I have a Eibli's Angel and a Midas Blenny that have occasionally shown very slight discomfort over the course of a month (Chromis have shown nothing). The Angel has scratched once that I have seen and the Blenny occasionally scratches on the substrate. I have seen only one white spot on both fish which disappeared overnight. Not sure what to do from here. I am pretty confident, if I left the tank as is, everything would be fine (if it is Ich, which I guess it appears to be, it has been very minor). I am concerned about adding future fish though. Should I just remove all fish and treat with hyposalinity to be safe (leaving display empty)? I just don't want to go through the hassle of removing fish and treating if it isn't absolutely necessary. Water levels are all fine and within normal ranges.