Tropic Marin Pro Reef Sea Salt 25kgTropic Marin Pro Reef sea salt is designed to meet the special requirements of reef aquariums with optimised concentrations of calcium and magnesium, promoting the growth of corals. The lower buffering and the correct pH value serve to stabilise the natural water values, and particularly, the hardness of carbonates, even with the use of calcium reactors. Natural and stable conditions for delicate marine life are achieved only by accurately balancing