I think once you have aiptasia you can never really get rid of it without removing the rock work. If it's not on the corals and you can separate the corals from the rock work, I would do exactly that. The problem is for me at least, it's really difficult to see and reach all areas of the rock. For me, fighting it with whatever was always a temporary fix. It always came back and spread. I bleached my rock and started over. Many people just recommend drying the rock out for a few days. I'd personally keep the rock out of the tank for 30 days to make sure nothing else is trying to grow in the tank. I didn't have a problem with aiptasia in the plumbing or my refugium. I caught one or two trying to grow in the sand bed/on the glass, before I put my rock back in, but I've never had a problem since. If your keeping the corals and have a QT tank, I'd QT them after taking out the rock.
Good Luck!