[I just finished moving my tank into it's newer taller stand, and am now running a sump/refugium. I plan to have mostly sps and lps corals in the tank. I just purchased some small frags from tranquil scapes, some montipora and some tri-color, and i was just wondering what everyone uses for calcium in there sps tanks. I'v tried almost every kind of calcium there is (liquid calcium, kalkwasser, Fish Paradise Natural Calcium) except for Bionic. I would like to know what everyone else uses, not just calcium but other things like iodine, strontium... etc. I was thinking about using two little fishes kalk, and there two little fishes CombiSan (supposed to add everything else needed to run a reef) Just let me know what you guys think.]