Seachem Reef Plus Concentrated Vitamin & Amino Acid SupplementSeachem Reef Plus is 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. Concentrated vitamin and amino acid supplement Use 10mL for every 40 gallons of saltwater For saltwater aquarium use only Seachem Reef Plus is formulated to provide nutrients available from natural tropical reef waters. Contains vitamin B12, vitamin