Peppermints will tear up aptasia like there's no tomorrow. Although, I had to remove all ten I added to my tank on account of them liking to eat polyps out of my SPS as well. Not sure if I'm the only one that has had this experience though. They would jam their front legs into the polyp hole, rout it out, then eat up the polyp. I almost had a heart attack when I was watching them do it. Fortunately, they were easy to catch and remove.