Do you run a phosphate reactor? Do you have a refugium? What is your PO4? I have several algae eaters, but no hair alge (yet). I'm getting a phosphate reactor this week to help with my green algae. If you want a great peaceful herbivorous fish(mine eats meaty too) ... I like my foxface lo : Saltwater Aquarium Fish for Marine Aquariums: Foxface Lo He's the most peaceful guy in the tank and can be introduced into angry tang land since he's venomous(compares to hornet sting) he'll take care of himself. My Yellow tang went after him , but by day three they're all buddies.. I've read the same on several internet entries. It's interesting that he can completely change colors. He turns black when alarmed.