I had a bubble tip on a rock and at night out came these pink stubby bristlwrms. They were very different from the regular browns one that come out after feeding. These never did . I did not know they were there until the bubble tip was too weak. It was rather too late I had tried doing everything to keep my parameters stable , flow right, ample light and nothing worked . I was clueless to these guys . They parked themselves under the rock where the anemone lived. The tank was at a school so I never saw the tank at night. until we had a late night function at the school and the lights were out in the tanks . That's when I saw them . They were on the anemone . Pulled the rocks out . Vacuumed the gravel scooping any bristleworms out. Decreased the sand depth to expose them better. Got out the rock and put in a canister filter with bio media to handle the ammonia and nitrates . Got an arrow crab(they relish bristleworms). The bubble tip never recovered . Now ,do you have that species in your tank ? Probably not. So,I don't think you would have a problem . But arrow crabs make short work of bristleworms . They tear them in half and eat them like candy.