Thats' the standard way to be sure that your fish won't get re infected. The ich has a 6 week life cycle and as long as they have no fish to attach to they will die. After they fall off the fish they are still in your tank waiting for more fish to infect.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.