Steve;
If this is your standard pinkish-grey bristle worm then I wouldn't worry about controlling the population. Most people, myself included, look on them as a good thing in our tanks. They clean up detritus and left over food. Their population will rise and fall depending on the availability of their food supply. I've only had them bother one coral, and that was a small piece of pipe organ I was trying to rescue. When it took a turn for the worse, the worms hollowed out the polyp tubes and took up residence.
I know that some people just can't stand the looks of them;the worms creep them out. Especially non-reefing spouses, or a co-worker in my case. I had a ton of Bworms in my old nano set up at work and I had a coworker who couldn't even stand to sit next to the tank. I put a six line wrasse in to control the population; the fish ate the little ones but left my big worms alone.
Sometimes the cure is worse than the disease. A coral banded shrimp might work out ok but I wouldn't put an arrow crab into any of my tanks. They'll eat bristle worms all right, but they'll also eat all your little tube worms, feather dusters and when the crab is bigger, any small fish you may have.
IMO, bristle worms are our friends...just don't pet them
Alice