Swimming Pool 7 In 1 Test Paper Ph Water Quality Test Paper 100pc Feature: The appearance of this product is a thin strip, end is arranged with the detection block according to the scientific distance, and the other end is a hand-held position. test strip of this product can simultaneously detect seven important elements of the sample. 1 minute, the total hardness, free, bromine, total, cyanuric, total alkali, and ph of the sample water can be detected How to use when testing 1. the colored part of the test strip in water and take it out 2 seconds. 2. Lay the test strip flat and wait for 30 seconds. 3. Compare the test strip with the color chart on the bottle body and complete the reading within 30 seconds to obtain accurate results Comparison of test results 1. Please use the color card on the bottle to compare colors. 2. There are seven rows of color blocks on the color card, which correspond to the seven test blocks on the test strip. Compare the test block with the color card and read within 30 seconds to get accurate results. Note: 1. Do not put wet into the bottle. 2. Do not touc h or contaminate the test block on the test strip with your hands. 3. Tighten the bottle cap each time removing the test strip. 4. Compare the color of the test strip under good light to get the best reading. 5. Store in cool, dry and dark conditions. 6. It is recommended to use up within 90 days opening. Package include: 1 bottle of 100pc test strips