ReeFlowers Caledonia Sea Salt is produced from natural marine salt. Containing no additives, ReeFlowers Caledonia Sea Salt is enriched with high purity grade minerals (kH, calcium, magnesium, potassium, and strontium) to facilitate the fast, healthy growth of corals and other reef organisms. Elements that can facilitate algae formation, such as nitrate, iron, and silicate, have been removed. Created using Smart Particle Technology®, ensures that each preparation results in water with stable values.