I've gotten peppermint shrimp before. I got one for my QT tank and it went right after the aiptasia. I then put it in my DP and it went after them again but then I didn't see it anymore. I since then bought 2 more and none went after the aiptasia. I also haven't seen them around either. I guess my water chemistry must be off. I'm going to try the lemon juice to see what happens. $10 a pop for shrimp that don't do what I want or die soon after placing them in the tank isn't cutting it!