API Quick Start Aquarium Nitrifying Bacteria Contains one (1) API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 16-Ounce Bottle Allows instant addition of fish when starting a new aquarium Reduces compounds harmful to fish when used routinely Helps prevent fish loss in freshwater and saltwater aquariums Use when starting a new aquarium, when adding new fish and when changing water and filter media