Monster, Had you read anything about the positive benefits of live rock for all the inhabitants? The good bacteria and such? Fish will for the long haul, be much happier and healthier. Restaurants resupply their fish in tanks which probably do not get sufficient water changes, but those tanks lose fish constantly and the co's that care for the tanks simply keep adding new fish. I know because I ask who cares for such tanks and how many fish die on a monthly basis in tanks which haven't any live rock . Waiters are always very informative when questioned about the demise of the fish in those tanks. You could have both. Just add some live rock, maybe 40-50 lbs. of it. Just hate to see fish in such an unnatural existance, but it's your tank and your money. Good luck anyway. Can't say everything is perfect {algea} in my tank but have had the same fish except for additions, for ten years with 75lbs{at least} of live rock. In time, live critters develop and multiply in live rock giving natural food to some of your fish, and of course algeas that develop, tangs eat. Yes, you will get bristle worms but they airrate the subdtratum and actually do some good. Also eat up left over debri . I catch them under rocks easily with patience, and toss out the larger ones from time to time. Sorry for running on!