Over the past week my hippo got white spots... they have gone away now and no other fish seem to have any. I did nothing different with my tank and levels are good. I didn't treat with medication since I have corals and other inverts. Has anyone else experienced this before? My hippo has gotten ich once before months ago for only a few days. Like I said I can't find anything different with water parameters, she is a pig when it comes to seaweed and her colors have stayed consistant. I know tangs are prone to ich but this just sees strange to me.