You made sure they were true Peps and not Camel Shrimp right? They are often confused and Camels wont touch aiptasia. Peps have always worked for me.I've had joe's juice work at killing them about 3 years ago (100% success on first dose) and I've never seen peppermint shrimp touch them. Right now the only pest I have is one curlie q anemone but no majanoes or aiptasia.