Aqua Vitro Reef Fuel - 11.8 Fl Oz Seachem Laboratories - Aqua Vitro Reef Fuel Fuel is a comprehensive carbohydrate, vitamin, amino acid, polyunsaturated fatty acid, and trace element supplement developed to address nutritional requirements commonly associated with corals fuel contains ascorbic acid in a base of chlorella, which contains a rich assortment of amino acids and vitamins The health benefits of chlorella are widely known and while spirulina, a similar algae, has been regularly used in the industry, aquavitro is the first to utilize the vastly superior chlorella fuel is formulated to provide nutrients available from natural tropical reef waters