Puffers are great. I've got a saddleback toby I wouldn't trade for anything. You're always taking a risk putting one in a reef tank. They may be a great addition, or they may feel the need to nibble on everything. My toby felt the need to sample my clam's mantle when I first added it to my reef tank. Now it leaves my clam alone and just spends the day grazing my rock, sand, and back glass... Your call.... Are you willing to risk prized colonies or favorite fish? If not, put a puffer in a FO or FOWLR.