Thanks for the tip - I have a smaller tank and the peppermints worked great for me. I had the same problem with Joe's Juice, where I used it, it worked great, but it seemed like some of the dead ones must have split, because I got dozens all over the tank. (I know people love it, and I probably did something wrong, but...I wasn't going to risk it again)
I put 6 mid-sized peppermints in my 24 gallon and the aiptasia were gone within a week. I made sure to put in some mysis a half hour after lights-out and watched my shrimpies come out to feast after that

They've declined in number, but I still have a couple of bigger ones.
Note: make sure you feed your copperband once he's done with the anemones. Too many starve or get taken back to fish stores.
Also: My peppermints didn't touch the one big Majano in my tank, so if Copperbands will do that, it's another advantage.