get LR, its benefits far out weigh any danger. alot of people on this board will tell you not to remove your bristle worms, and then some will. so they really arent that bad. only thing you need to worry bout is a mantis shrimp. not too big of a danger of that though. and if you do get one, you can fix it. so i highly recommend LR, and a i think about everyone else will too.