My tank had ich outbreak 2 month ago, my Achilles was sometimes good, sometimes covered of white spots; but moorish idol and CBB were really bad. I ended up taking out all the rocks, and put all my fishes in QT for hypo treatment. It's been 5 weeks that my fishes in hypo. To my surprise, Achilles is actually doing really good in hypo, even I was struggling in keeping ammonia level down in the first two weeks.