Botanicare Hydroguard Bacillus Root Inoculant, QuartBrand: Botanicare Color: Natural Features: Botanicare Hydroguard assists in the decomposition of organic matter in hydroponic gardening Contains bacillus, a natural bacterial root inoculant Helps convert organic matter into nutrients that may be absorbed directly by the roots of a plant Amplifies root mass and vigor Use every time you water during the growth cycle This product is good for 2 years AFTER the date on the bottle and it should be used