1 Relax and soak: These test strips are specially designed for hot tubs and hot spring water. Reliable and accurate readings can be obtained within a few seconds, and you can easily enjoy the next soak with your loved ones. 2 Ultra wide and easy to read: Our test papers are very clear, and the colorless color cards make them easy to use and read. In addition, they are faster, easier, and more accurate than liquid test kits. 3 The kit contains 50 hydrotherapy test strips, which will last for 3-5 months and will be tested 2-3 times a week. Save time, money and trouble while confidently knowing that your water is balanced and safe. 4 3 in 1/5 in 1/6 in 1 chemical test is optional: free chlorine, bromine PH, total alkalinity in 3 in 1 test; 5 in 1 test free chlorine, bromine PH, total alkalinity, Total hardness, total chlorine; free chlorine, bromine PH, total alkalinity, total hardness, total chlorine, cyanuric acid in the 6 in 1 test. Our six tests provide more comprehensive information about the water balance, and you can choose the type you need according to your needs. 5 Wide range of applications: it can be used to detect urine and saliva to detect the acidic and alkaline pH of the human body. It can also be used in schools, laboratories, drinking water, swimming pools, aquariums, hydroponics, aquariums, food, etc. 6Testing method: 7 Open the sealing film, take out a piece of test paper, and immediately close the bottle cap. 8 Immerse the reaction area of the test strip in the solution to be tested for 1-2 seconds, take out the test strip, and moisten the excess water with paper. 9 After 1 minute, compare the color of the reaction area of the test strip with the color table to determine the test value of the solution to be tested. 10 The color comparison time is best controlled at 60s, too long or too short will affect the reading.1 * Water quality test paper (50 Strips)