The fish still have ich. They just are able to live with it for the time being.Actually ... my LFS owner said an easy way to get rid of Ich is to turn up the temp to 80 degrees and overfeed your fish - but add garlic drops to defrosted mysis shrimp and let it sit for about 5 mins. I tried this and it worked like a charm. I have a 120 gallon reef tank primarily with LPS and A couple of SPS. It took about 3 days to notice a change but within a week the fish were fat and happy. Can’t explain it, but it worked.