As was already stated keep an eye on your alk as well....as you raise your calcium your alk will have a tendancy to drop, you need to adjust both accordingly. I have used Kent turbo caclium and super dkh for over a year with no problems. I only have a 65 gallon tank though...your size of tank you might want to consider a calcium reactor once you get everything up to snuff.
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65 gallon tank, 3 gallon refugium, 90lbs LR, 50 lbs live sand, Coralife Super Skimmer 125, 24" 250 watt DE Pendant w/14K Hamilton. 1 ocellaris clowns,1 Tomini Tang, 6 line wrasse, 12 turbo grazer snails, 12 nassarius snails, 12 Cerith. Open Brain, Metallic Green Brain, candy cane coral, 1 enchino frags, and 2 maxima clam.
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