I wouldn't worry about adding a peppermint as a second shrimp. When I put 3 in my 120 (purchased at TPA) I never saw them again. In about a month all the aiptasia was gone.
There's also these
http://www.marinedepot.com/Coralife_Aqua_Gloves_%28One_Pair_Shoulder_Length_Protective_Gloves%29_Protective_Gloves_for_Saltwater_Aquariums-Coralife-ES09505-FIMTPG-vi.html