Seachem Stability Top Secret bacteria formula for cycling new aquariums and for maintaining existing aquariums. Size 250 ml. 4 year shelf life. Non sulfer fixing. Stability will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the #1 cause of fish death new tank syndrome. Stability is formulated specifically for the aquarium and contains a synergistic blend of aerobic, anaerobic, and facultative bacteria which facilitate the breakdown of waste organics, ammonia, nitrite and nitrate. Unlike competing products, the bacteria employed by Stability are non-sulfur fixing and will not produce toxic hydrogen sulfide. Stability is completely harmless to all aquatic organisms as well as aquatic plants, thus there is no danger of over use. Stability is the culmination of nearly a decade of research and development and represents the current state of the art in natural biological management. DIRECTIONS: Use 1 capful (5 mL) for each 40 L (10 gallons) on the first day with a new aquarium. Then use 1 capful for each 80 L (20 gallons) daily for 7 days. Fish and other aquatic species may be introduced at any time as long as dosage is maintained for 7 days. For optimum biofilter performance use 1 capful for each 40 L (10 gallons) once a month or with each water change and whenever introducing new fish or whenever medicating an aquarium.