API Quick Start, 16 OZ

API® Fast-Acting Bacteria allows immediate fish addition, as it instantly starts the aquarium's natural cycle with the help of beneficial bacteria that convert toxic ammonia to nitrite, then to harmless nitrate, helping prevent fish loss in your aquarium.

Best used when starting a new aquarium, after water changes and filter changes, and when adding new fish to an existing aquarium.

API Fast-Acting Bacteria can be used in both freshwater and saltwater aquariums.

Add 10 ml per 10 gallons of aquarium water.