Our Coral Essentials, Coral Power Reef KI3 is a concentrated blend of Potassium Iodide and Iodine (0.5%) for marine aquariums. It is essential for healthy growth of both soft and hard coral, enhanced blue and violet colouration in corals, as well as the promotion of healthy macroalgae growth. Iodine is utilized by corals for the synthesis of pigments, which allow them to adapt to varying light conditions and provide their tissue with protection from UV radiation. To ensure healthy coral, invertebrates and macroalgae, maintain a dosing plan as detailed below. Variances above and below the recommended dosing can be made depending on your own tank conditions and density of coral present.