ok so i purchased an open brain about a week or two ago and after about 3 days i come home to find my peppermint shrimp tearing chunks of flesh off it. .... long story short it ended up dying now i thought that peppermint shrimp were "reef safe" i am in the process of removing them from my tank as i am going to purchase more corals. Has anyone else had problems witht their shrimp and corals????