Well I had a few babies pop up throughout my tank, so I got 2 Peppermint Shrimp from LA. Within a few days all the babies are gone but the two big ones are still around but I kinda like them. Just as long as the Peps keep killing the babies I'll leave the big ones alone.
One sure way to get rid of them are Berghia Nudibranchs, they eat Aiptasia exclusively. Will hunt them down and not leave a scrap. Only will have to give them to someone with Aiptasia to keep them alive as they won't eat anything else.
I can confirm that the berghia nudibranches work very well..I just received 6 of them today from an online order, and within 2 hours they are eating the 2nd biggest aiptasia I have, which is they size of a nickel. I will see what they do to the remaining 4-5 I have.