Perhaps you should look at the reason why you have so many bristle worms in the first place before you go the predator route of control.
Bristle worms generally feed on dead and decaying material. The usual source of this in aquaria is overfeeding/overstocking and die-off. Try cutting back on your feedings and maybe lower your bioland and most of the bristle worms will simply starve to death until you have a manageable population that does its job as a natural part of your clean-up crew.
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