I've been adding a lot of rock from the LFS
lately, and there's always aiptasia's on them.
What I've found works miracles is concentrated lemon juice. Nail them in the stem with a couple CC's of that stuff, and they'll retract and never come back out.
I've killed a dozen or so in the last month with lemon juice, and never seen them come back or new ones appear (except on new rocks).
180G build thread
180G All-glass with dual megaflows in a custom stand
AquaC EV-180 skimmer
250 pounds LR
160 pounds aragonite
Custom acrylic sump from GlassCages.com
2xPCX-40 return pumps
2x250MH 14K, 2x175MH 14K - PFO lighting, 2x65W PC
No-name 36W UV
Water General 125GPH RO/DI