Tropic Marin Pro-Reef Salt been designed to meet the special requirements of Reef Aquariums. The lower buffering and the correct pH value in Tropic Marin Pro-Reef stabilises natural seawater values, and particularly the hardness of carbonates. Tropic Marin Pro-Reef is the ideal foundation for the care and growth of fish, corals and other invertebrates in Reef Aquariums.