Interesting method to cure ich. I hope to prove ich can be treated in a reef tank successfully.I had the same dilemma with my tank. cleaner wrasse will NOT cure ich, neither will the method I am about to tell you, but it worked for me twice.
treat all food with metro and focus for 21 days..
the only way to eradicate Ich from a tank is to remove all fish from main tank and go fallow for 8 weeks.