Ulisem 50-Pack Test Strips, 6-in-1 Spa and Pool Test Strips, Water Test Strips for Testing Free Chlorine, Bromine, Total Hardness, Total Alkalinity, Cyanuric Acid, and pH

Material: Made of high-quality imported filter paper. Easy to use: Very simple for beginners, just take a test strip and dip it into the water for about 2 seconds, remove it and lay it flat, and compare the reading with the color chart after 15 seconds. Easy to read: The color chart on the bottle's surface is convenient for reading the test strips. The large color chart allows you to easily distinguish test results. Wide application: Hot tub test strips suitable for drinking water, aquariums, swimming pools and spas, wastewater, and other liquids. Upgraded 6-in-1 test strips: You can test total chlorine, free chlorine/bromine, pH, total alkalinity, cyanuric acid, and total hardness all at the same time. One pool test strip provides a composition of 6 substances, covering all the necessary parameters you are interested in.