I'll say it. I've lost a lot of fish to ich in the past. I've had tanks since 1999 and have had a couple of whole-tank wipe outs (except Gary because he is bulletproof). I don't buy the feed heavy, keep happy method. I'm sure it works for some, but never for me. Once it showed up, fish start dying......unless I QT with copper quickly after i noticed it. I take NO chances with ich.
+1 Sawdonkey!
I removed all fish from DT, started a 12 week coral only tank on the 18th. Tried to beat the system, with 72 watts of UV on a 150 (each 180gph flow), so 200k UV exposure tank turn 2x/hr, fish eating, garlic, vitamins, fat, etc. Knowing what happened before, and seeing spots again, said I needed to rip off the bandaid. I kept telling myself that they were too hard to catch, let's see what happens, and they kept eating, but, progressively more spots. It was actually pretty easy to catch, even the 6-line, I put a 12x8" net in the tank overnight, and didn't feed them for 24 hours, then dropped food in the net, all caught pretty painlessly without tearing up the tank.
I'm sure that others have had success with living with ick, but, I'd rather take the 12 week penalty one and done. Have 10 healthy, fat ick free fish in copper in a 28G and 14G QT tank, that are looking forward to returning to their 150G home once it's ick free.