Ich.... Help!

Have you tried Herbtana from microbelift? I have used it in my tank when I had an ich breakout and it worked for me. It's supposed to help fish with their immune system. Check it it out it might be worth it:

Microbe-Lift.com :: Herbtana (Reef)

 

FWIW, my hippo tang was showing signs of ich but I had to leave for the weekend and couldnt tend to it. came back and Tang was full blown ich and not doing well. tore my rock apart trying to catch him. pulled him out,
gave him a 2 minute fresh water bath and put him back in the tank. next day he looked better and 3 days later was eating and swimming around and is in great shape. that was 2 months ago and my hippo is doing awesome. not sure why the ich didnt shed into my tank but no one else got sick and my tank is healthy as can be. my LFS guy said fresh water bath at first sight of ich and its gone. it worked for me. I lost an entire 90 gallon tank to ich because I didnt know what to do and waited too long and was too scared to try anything. killed everything. I'm sticking by the fresh water bath method. good luck