How many QT new or sick fish for ich?

[Keri]

I QT if new - at least 4 weeks usually. Not always in my bare QT tank tho, I QT'd the tang in the 27g FOWLR because I thought he wouldn't be happy in the 10g QT, He was healthy, but if he were not it's a lot easier to catch him in the 27g and pull that apart than the DT! I've had a new fish develop ich (my tiny foxface) and I was able to treat him sucessfully, pulling him out of the DT would have been an incredibly hard thing. I tried to catch my yellow wrasse out of there when he developed a pink patch for a week but was unable, I had to hope for the best and feed him well. (which worked that time but don't always count on it!)