We'll you don't need to buy a peppermint unless you just want too. The best way I have found to get rid of aiptasia is a product called joes juice you can order it from dr foster and smith..you can also just boil some water and get a syringe and just blast hot water over it until it melts. And no a regular anemone such as a bubble tip, long tentacle, or a carpet won't get ate by a peppermint shrimp so if you do get one you don't to worry about that.