ReeFlowers Calcium Blend is a high-density ionic calcium solution that assists in the structural development of corals oysters and similar aquarium inhabitants. Calcium Blend contains a minimum of 150.000ppm of calcium in each 1 litre bottle. If other physical and chemical requirements are met 440-460ppm of calcium in reef aquariums assists rapid growth of corals and the skeletal structures of similar aquarium inhabitants. Every aquarium has a different calcium consumption level. Before using the product determine the calcium concentration of your aquarium using an appropriate test kit. A maximum of 20ml of solution per 100 liters of water can be added daily until the optimum calcium level is achieved (1ml of solution provides 1.5ppm increase in 100 liters of water). Once the desired level is reached optimum consumption can be determined by means of periodical tests. Solution can then be added daily or weekly as required. If the daily consumption level exceeds 5ppm it is recommended that the solution be added continually via a dosing pump.