I would say most are good with fireworms being the exception. If you have a fireworm you will know it quickly because they will be on coral and eating them. Fireworms are fairly uncommon so i would not worry about them that much. I for one do not advocate trying to rid your tank of bristleworms. They are good detrivors and are part of your clean up crew. If you have a lot of bristles it is probably because you are overfeeding your tank.