Reeflowers Caledonia Reef Salt is produced from natural marine salt and is specially formulated for reef aquariums. Containing no additives ReeFlowers Caledonia Reef Salt is enriched with high purity grade minerals (kH calcium magnesium potassium and strontium) to facilitate the fast healthy growth of coral and other reef organisms. To achieve a salinity ratio of 335 ppt add 33 gr of ReeFlowers Caledonia ReeF Salt to each liter of R/O water. Stir the water until salt is fully dissolved then slowly add the prepared salt water into the aquarium ensuring not to pour direnctly on to live organisms.