Where did you get your peppermint shrimp?I added about 30 peppermints to my display to get rid of aiptasia that came in on live rock from TBS. Haven’t had a single aiptasia for a while and all my Coral seem unaffected. Maybe I’ve been lucky.
It looks like I can order 20 with free shipping from one place. I don’t know if I trust they’ll be the right type. I can buy the captive bred ones from algae barn, but they’re expensive.