FRITZ ZYME 7 FRESHWATER NITRIFYING BACTERIA contains live, active, non-pathogenic Nitrosomonas and Nitrobacter nitrifying bacteria. Proven to be the best product available for ammonia & nitrite reduction by laboratory testing performed at the University of California, FRITZZYME #7 begins rapidly converting ammonia & nitrite to non-toxic nitrate when added. Always add FRITZ ZYME #7: - To new tanks - When adding new livestock - After any rigourous cleaning - Changing Gravel - After changing filter cartridges - After medicating - Whenever ammonia/nitrite imbalances occur Quick and Easy Reference: - Nitrifying Bacteria count (minimum) 2,000,000 per ounce - Professional formula for use in all freshwater systems; safe for use with plants, snails & discus - Removes ammonia and nitrites the safe, permanent and natural way - Does not require refrigeration - Add 1/2 cup (4 oz) per 10 gallons to jump-start new systems or reduce ammonia/nitrite spike