Rid of agae on montipora?

[Vitaminz]

I had an issue not long ago with the green hair algae, and I tried almost everything, brushing them off, using fish, snails. They all seem to keep it from growing out of hand, but nothing to get rid of the problem. Then I got some medium size hermit crabs, mix of blue and red legged ones...And wouldn't you know it, I haven't seen the little tuff of turf in a while. I put 5 of them in my 30g nano, and took care of the issue.

Jeff