Aqua Medic Reef Salt coral is a specially made high quality formulation suitable for all modern reef aquaria. The package content is sufficient for the production of 600 l aquarium sea water.Aqua Medic Reef Salt coral+ contains vitamin B complex for the supply of corals with the vital+ vitamin B12 (according to scientific investigations)+ provides ideal nature-like conditions for growth and coloration of SPS and LPS corals+ with pH buffer and high calcium and magnesium content+ contains all the essential trace elements+ blended from chemically pure raw materials, continuously quality controlled+ dissolves easily and leaves no residue, so can be used quickly+ 20 kg for 600 l aquarium waterMajor elements dissolved in desalted water, at 35Na Sodium 10500 mg/lMg Magnesium 1450 mg/lCa Calcium 500 mg/lK Potassium 420 mg/lCl Chloride 19800 mg/lSO Sulfate 2200 mg/lHCO Bicarbonate 210 mg/lSr Strontium 16 mg/l