This is a 16-in-1 water test kit. The test strip can monitor 16 elements at once, including: pH value, hardness, lead, iron, copper, mercury, total alkalinity, nitrite, nitrate, bromine, free chlorine, total chlorine , fluride, chromium/, carbonate root, cyanuric acid, which cover the major factors that can contaminate a pool, hot tub or drinking water quality. Our aquarium tester strip kit uses the most reliable test strips to the accuracy of water quality tests. It comes with a detailed color chart, detect low levels of impurities and foreign substances, help prevent any water problems. This water quality measurement kit has also been used in science education. This 16 in 1 home water test kit comes with a tube and dropper, which avoids water pollution and is easy to operate. The 16 in 1 water quality testing paper allows you to test the water quality in a few seconds, which is quick and convenient. Water testing kit for drink water can be applied to all kinds of water testing, such