I have a 45 gal tank...60lbs live rock, mushroom corals, anchor coral, and some polyps. 3 green chromis, Royal Gramma, 2 clowns and a hippo tang which I put in on 06-24. On the 29th I noticed some ich spots on the hippo tang. Per the advise of pet shop, I put in a cleaner shrimp and the hippo keeps going to it. Several weeks later, still have not lost any fish but ich is still there, I am doing 20% water changes weekly, feeding high quality food with some liquid garlic added. Fish are eating well, but the ich seems to be getting worse on the Hippo Tang and my Royal Gramma. Like I said both are still eating well, not sure what else I can do. The cleaner shrimp set up its cleaning station, but then I read they will not eat ich nor will a cleaner wrasse which I was told to get. Any other advise out there?