I have only had a reef tank setup for about 6 months now and have been learning alot. My question is; should you use additivies or not? At first I never did and everything looked pretty good, then someone at the LFS told me to use reef additives, like calcium, iodine, and scromium, so I did then some of my soft corals were looking bad. So I cut back on them and was just wondering what other people did.