The use of kalk reactors and additives strongly affects the water chemistry, which requires an adjustment of the sea salt. Only in considering the combination of all influences, can optimum conditions be created that are both natural and stable. This new sea salt is adjusted to the specific requirements of modern reef tanks: optimized calcium and magnesium concentrations promote coral growth and ease the care of even very sensitive hard corals. With this salt, the buffering system and pH-level have been especially adapted to stablize the natural water conditions and to accomadate the use of calcium supplements or calcium reactors.