16-in-1 water quality test strips for fast, multi-parameter testing with results in seconds. Key features - 16-in-1 test strips cover total alkalinity, pH, hardness, iron, copper, total alkalinity, nitrite, bromine, free, total, /Cr, carbonate, and cyanuric acid. - Fast results in seconds for quick decision making and problem solving. Wide application - Suitable for testing drinking water, aquariums, swimming pools and spas, service water, ponds, and hot springs. Professional accuracy - High quality water testing with accurate color readings and high sensitivity. - Uses professional quality drinking water test strips to meet water quality standards. Pack contents - 100 test strips per package, providing 100 tests to cover most water testing needs. Use scenarios - Home drinking water safety checks and routine monitoring. - Aquarium or pond maintenance to track key water parameters. - Pool and spa chemistry monitoring to maintain safe, clean water.