I had em all over the place at one point. Then, one day, they all went away. In short, i'm not sure what you can do to get rid of em, but maybe it will take care of itself.
I have them in a few places in all of my reef aquariums. And they sting the ************** out of me every so often. I hate those things. :mad2:
Normally they run cycle, then starve out. If you are feeding micro-foods of any kind, this could be stimulating them. Discontinue use for a while and they should all go away.