Coral Color C is an iron & complementary trace element complex that promote the green colors in corals. This complex contains 8 “light” metals, including Iron, Manganese, Cobalt, Copper, Aluminum, Zinc, Chrome and Nickel, which are micro-elements that are essential to many bio-chemical metabolic processes, including respiration, production of energy, chlorophyll and photosynthetic catalysts. C elements are related to the green/yellowchromo-proteins.