Reef Plus, 2 L / 67.6 fl. oz. Concentrated Vitamin And Amino Acid Supplement A Full Spectrum Reef Supplement Containing Trace Elements, Vitamins, And Amino Acids Demonstrated to have a positive impact on the growth of corals and other desirable reef creatures Formulated To Provide Nutrients Available From Natural Tropical Reef Waters 250 Milliliters Treats 1000 Us Gallons