Red Sea Coral Pro Salt is the ideal salt mix for reef aquariums, encouraging accelerated, healthy growth and enhanced vitality of all corals. Red Sea Coral Pro Salt's unique formulation is created by blending natural solar evaported salt, harvested from the waters of the exotic red sea reef together with other fine elements including biologically balanced elevated levels of calcium, magnesium and carbonates - essential for inducing sustainable coral skeleton growth. Each individual crystal of the harvested salt contains 45 of the minor trace elements present in reef water and together with the other components of the formula, it guarantees optimal levels of 57 elements, even in small water changes. Due to the unique production process, Coral Pro Salt does not contain higher than natural levels of heavy metals and therefore does not contain organic binders. 22kg bucket makes approximately 660 litres.?