I,m with Rob on this one. Although they do indeed thrive on dirtier tanks, once they get a foothold, its hard to contorl them with nutrient removal alone.
My 225 that I fought them in was very low in organics. It was bare bottom, ran a huge beckett skimmer and a large alage turf scrubber. I have heard of the scooters eating them. Even the common yellow tail damsel. My mandarin & three wrasses did eat them, but could not control the population without help.
I read about all the "natural" ways of reducing them. Trying those in my large tank, allowed them to reproduce at will.
A long battle using tons of skimming, sucking them out, & Flaworm Exit use, finally got rid of them.
Its a fight I would not wish to do again. Thats my experience with them. Everything I now add, has "exit" added to their acclimation process.