NYOS Pure Iodine is a concentrated elemental iodine supplement designed to enhance and maintain optimal levels of iodine in saltwater aquariums housing coral reefs, particularly those with stone corals, molluscs, xenia, or cespitularia. This essential trace element plays a crucial role in the health and growth of marine life, preventing deficiencies that can lead to degenerative conditions such as pale colors and tissue loss. The NYOS Active line provides reef keepers with professional-grade products developed through extensive research and testing by expert coral breeders.