I never put frag plugs in my tank, aiptasia will not live on healthy live coral tissue do I always remove any coral I'm buying, dip in revive for other pests, then mount it that way. You always see aiptasia on frag plugs. I haven't been able to buy any zoas because they seem to be aiptasia magnets. Every zoa rock I've inspected at the few stores near me have aiptasia hiding somewhere. Enough to scare me off from buying any. When I but a hammer or frogspawn I dip and scrub the crap out of the branches with a toothbrush while it is in the dip. Any removal technique you do I would do it outside the main tank to reduce the chance of them spreading. Good luck.