It will smother the other corals. I had that problem a while back, and Turbo snails, emerald crabs, blue leg hermits, and frequent water changes got rid of all of it. I still have normal growth of algea, but its just the right amount needed for food for the clean up crew. If anything I would remove most of it. It will still continue to grow, and the clean up crew will take care of it in no time.