Here's where we keep our parameters: kH (Alkalinity) - 7.8 - 8.2 Magnesium - 1400-1440 Calcium - 420-440 No3 (Nitrate) - 5 - 10 ppm Po4 (Phosphate) - .02 - .04 These are the parameters that we keep the corals at in store, and when we ship! We keep our corals under certain lighting and flow conditions to keep them happy! Here's the breakdown: SPS ~ 250 - 600 PAR Medium to High Flow LPS ~ 150 - 300 PAR Low to Medium Flow Soft Coral ~ 80 - 150 PAR Low to High Flow For more information, visit our "How We Keep Our Corals" page!