General description These 15-in-1 pH test strips are designed for a variety of applications, including testing drinking water, aquariums, fish tanks, swimming pools, spas, ponds, and hot spring water. The high-quality water tester features precise color coordination and high sensitivity, delivering results in seconds. Technical specifications Tests for 15 parameters: pH, Residual Chlorine, Total Chlorine, Hardness, Total Alkalinity, Copper, Iron, Lead, Nitrate, Nitrite, Carbonate, Bromine, Iodine, Cyanuric Acid Pack size: 100 strips Usage To use the test strips, dip the strip into the water for 2 seconds, then hold it in the air for about 1 minute. Afterward, match the color of the strip to the color chart on the bottle to obtain the reading.