API Test Strips AmmoniaBrand: API Features: Contains one (1) API AMMONIA TEST STRIPS Freshwater and Saltwater Aquarium Water Test Strips 25 Test Box Monitors water quality and prevents invisible water problems that can be harmful to fish Dip test strips into aquarium water and check colours for fast and accurate results Monitors water quality and prevents invisible water problems that can be harmful to fish Dose several times a week when starting a new aquarium then weekly