Hikari Bio-Pure Frozen Mega-Marine Algae is high in freshwater and helps your fish purge salt from their system, and digest their food more completely and with less energy. As a result, your fishy friends will grow faster and be more vibrant in color. Fortified with multi-vitamins, Mega-Marine Algae provides maximum nutrition for your fish. In addition, it is sterilized in three steps to ensure it is free of harmful bacteria, parasites, and foul odors.