Swimming Pool Test Paper Water Total Alkalinity Total Hardness Test 200pcs Features Portable design: 100 test strips per pocket. And the pocket is small and easy to carry. Test paper is used for analysis (PH value, total alkalinity, hardness, nitrate, nitrite, bromine, total chlorine).The water quality should be tested weekly. Our package of test strips includes 100 test strips. Test strips are used to test the water quality of drinking water, household faucets, well water, fresh water ponds, fish tanks, swimming pools, etc. Wells and pipes or swimming pools are easily contaminated. It is recommended to use this test paper frequently to test water quality. Accurately measure your pH to show the alkaline state to ensure the safety of your body and water. High precision. Easy to use. Used in swimming pools, spas and other industries. Instructions 1. Immerse the reaction area of the test paper in the solution to be tested for 1-2 seconds, take out the test paper, draw the edge of the test paper along the wall of the solution container, and remove excess water on the surface. 2. 1 minutes, compare the color of the reaction zone of the test paper with the color of the color card to determine the test value of the solution to be tested. 3. The color comparison time is best controlled within 60s, too long or too short will affect the reading. Package includes 200 x Test Paper