I have found the acclimation method Biff described to work best for me as well I just substitute the cup for a turkey baster or syringe. From what I have experienced I would say that shrimp, and peppermint shrimp in paticualr, do not do well with warm temperatures and big temperature swings. Try to keep temps at a constant and under 82 if possible. Also, from what I've heard peppermint shrimps have a 50% chance of eating aiptasia. Some do some don't. Hope that helps! :mrgreen: