API Quick start nitrifying bacteria allows for the instant addition of fish, as it immediately starts the natural aquarium cycle with beneficial bacteria, which converts toxic ammonia into nitrite, then into harmless nitrate to help prevent fish loss in your tank. This treatment also helps to maintain an active biological filter in an established aquarium for healthy water conditions. API QUICK START nitrifying bacteria may be used in both fresh and saltwater aquariums. Add 10 ml per 10 gallons of aquarium water. Contains one (1) API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria 118 ml 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. In a new aquarium, harmful ammonia and nitrite build up from fish waste, often resulting in fish loss or “new tank syndrome”. The unique, patented nitrifying bacteria in API QUICK START Freshwater and Saltwater Aquarium Nitrifying Bacteria are scientifically proven to quickly consume ammonia and nitrite to help prevent fish loss.