Tantora Shrimp Series HUMIC Black Water is a highly concentrated supplement for freshwater dwarf shrimp and fish. It contains humic and fulvic acids, vital nutrients for proper health and growth. HUMIC Black Water also stimulates the growth of microorganisms that remove aquarium wastes and also feed young shrimp and fish. The essential acids in HUMIC Black Water help lower shrimp stress, encourage proper molting, and enhance growth and reproduction. HUMIC Black Water acts as a natural pH buffer and nutrient for aquatic plants. Add 1mL per 25L (6-7 gallons) or 1 drop per 3-4 gallons. 60 ml bottle.