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 invisible 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 as drinking water, swimming pools, hot tubs, spas, ponds, aquariums, industrial waste water, etc., offering the accurate values of water quickly, safely and easily. Key Features: Fast Testing and Easily Read: Put the test strip into the water for 2s and remove it, then hold the strip horizontally for 60s, compare with color chart on bottle to get accurate value of the fish tank. You can get accurate results within 30s. Sufficient Quantity: One bottle contains 100 test strips, which is enough for meeting your needs for testing water quality, and the portable design allows you to carry with you easily. Specifications: Product Name: 16 in 1 Water Testing Kit Specification: 100 pieces/box Material: paper Color: As Shown Reading time: 60s Test items: pH value, hardness, lead, iron, copper, mercury, total alkalinity, nitrite, nitrate, bromine, free chlorine, total chlorine , fluride, chromium/, carbonate root, cyanuric acid, Scope of application: suitable for groundwater, well water, tap water, aquarium, swimming pool and spa, industrial water, pond, , etc. Note: 1. When taking out the test strip, do not touch the reaction end of the test strip, so as not to pollute the test paper and affect the test result. 2. After taking out the required amount of test strip, seal the remaining test strip and store it away from light. 3. Try to keep the liquid to be tested colorless or light. The liquid with too dark color can be dehydrated by activated carbon adsorption before detection. If the liquid to be tested is turbid, let it stand for a period of time, and then take the clear part for testing after precipitation. Package Contents: 1 set x 16 in 1 Water Testing Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.