Description FREE Shipping on orders over $35. *in the lower 48 states* Replaces essential calcium used by corals, clams & other invertebrates. Calcium should be maintained between 380 ppm.-400 ppm. In marine fish 425 ppm-460 ppm. In reef aquariums at specific gravity of 1.026/35oot. At 77F/ 25C. Calcium is also available in 2 pound jars which makes 2.25 gallons of super concentrated calcium solution. 7.5-pound pails that make 8.5 gallons of super concentrated calcium solution and 30 pounds cartons that make 34 gallons of super concentrated calcium solution. Calcium is a USP (food grade) form of CaC12
