The unique nitrifying bacteria in Chicos medicine are scientifically proven to quickly consume ammonia and nitrite to help prevent new tank syndrome Chicos medicine gives you 6 months warranty The formula of the medicine allows immediate addition of fish to a new freshwater or saltwater aquarium Chicos original nitrifying bacteria medicine is ideal for starting a new aquarium, adding new fish, changing water, changing filter media, after medicating , or whenever ammonia or nitrite are detected