MicroBacter7 - Complete Bioculture: A complex system of non-pathogenic aerobic and anaerobic microbes, as well as natural enzymes, specifically formulated to establish biological filtration in new aquarium setups. It enhances the rate of nitrification, denitrification, and organic waste degradation in marine and freshwater aquaria through complete nutrient remineralization. Recommended for use within 1-year after purchase. Shake well before using and mix with aquarium water prior to addition. Best results may be obtained by adding the mixture to an external biological filtration system.