I was having a really bad outbreak of Aiptasia in my tank and i tried alot of different methods to remove. I started with using lemon juice or boiling water to kill them, then i went out and bought some aiptasia-X. This seemed to work ok for the larger ones that i could squirt in time, but didnt really seem to put much of a dent in their population.
So then i tried adding a few peppermint shrimps, they seemed to munch on the smaller baby anemones but didnt do much for the larger ones. And slowly they kept dissapearing one by one. I added a few more, only to realize my skunk cleaners (huge ones) were cannibals and killing all the peppermints.
I gave up on the peppermints and bought an Aiptasia Eating Filefish. He for some reason didnt acclimate well to my tank and died the next day (poor lil fella) but im convinced he would have helped. I went to a bunch of LFS and nobody seemed to have anymore filefish, so on the recommendation of many i added a copperband. (I did make sure to watch them feed him at the LFS and ensure he looked healthy, wish i had done this with the filefish).
After adding him to my tank, much to the disapproval of my yellow tang (he/she is a bit of a diva) sure enough the aiptasia has vanished! Its funny because I watched him really carefully making sure he wasnt munching on my corals and i never really saw him pecking at the big aiptasia. He is constantly pecking the the rock/sand at something small enough that i didnt notice what it was. Long story short the little bugger has cleaned all the aiptasia from my tank and now im debating either swapping a bunch of rock out from my biocube or just putting the copperband in there (its a bit small for him i know, but a few days wont hurt him much will it?)