Enables the addition of biologically ideal calcium to the reef aquarium, The formula for healthy coral growth, BIO-CALCIUM re-creates conditions in the aquarium equivalent to a natural reef only carbon dioxide and calcium in the biologically ideal form are added to the water, In contrast to other calcium additives, the ion equilibrium is maintained with BIO-CALCIUM, The pH-value remains stable, How to Use BIO-CALCIUM:, Calculate the total system water volume, being sure to take into account volume of live rock, external filters and sumps, Each level measuring spoonful (5 ml) raises the calcium level of 5 gallons (US)/4 gallons (Imp) of system water by 28 ppm, Maximum recommended dose is one level scoop for each 5 gallons (US) / 4 gallons (Imp) of tank water per day, Key benefits:, Adds all 70 trace elements including strontium, molybdenum and iodine, Only natural substances are formed when dissolved, Add directly to your tank, no need to premix or drip, Supplies calcium carbonate for corals and CO2 for the zooxanthellae, Will not influence pH of aquarium if used as directed, Measured amount of calcium in a truly ionically balanced formula, SKU: RYLHC6332