Help with damsel

[windcoast reefs]

Okay, Im pretty sure he doesn't have itch. He really doesn't have any of the physical symptoms (white dots) . I think it is just a weird thing he does when he eats. I have only seen him rub up against a rock twice. I will put then in another tank for the time being. Should I just set up a small five or ten gallon tank as a hospital tank? Should I be running skimmer and powerheads as well?