1.3-in-1 Pool Test Kit tests pH, total hardness, and chlorine using reliable test strips, allowing you to monitor pool water quality anytime. Accurate results: Do not touch the test strip with wet fingers. Read in natural light for the best color match. Store in a cool, dry place. Precise and scientific: The water quality test set has focused on tests and measurements for many years, using reliable test paper to ensure the accuracy of water quality tests. Ease of use: Take a glass of pool water sample, dip the test strip for 2 seconds, then wait 60 seconds and read the results on the color chart. Simple to operate. Applications and benefits: - Regular home pool maintenance - Spa or hot tub water care - After chemical treatment or shock to verify chlorine and pH levels Key attributes: compact, easy to use, three-parameter check, color-chart readout, rapid 60-second results.