I plucked the aipstasia our with a tweezer make sure you get the whole thing. If not follow that up with Joe Juice and that should do the trick. I had my tank for 9 months only seen three during that time. Maybe I just got lucky who knows but it worked for me. good luck.
listen ive tried it all.....ive found the best salution is to glue them in the rock...but they do pop out other holes in the rock....pour hot acid on them and chant???
I used the aiptasia control and it worked great! but wasnt able to get those in the back of the tank and in those hard to get to places. I added 3 peppermint shrimp and they took care of it in a week.