These 3-in-1 water test strips accurately measure PH, chlorine, and alkalinity levels in swimming pools and other water sources. With an easy-to-read color chart, quick results, and wide applicability to different water sources, these strips help keep your pool water healthy and clean. Features 1. 3 in 1: Swimming pool precision test strip, each test strip can be tested at the same time: Total Chlorine, test range 0-1-3-5-10; PH, test range 6.8-7.2-7.4-7.6-8.0-8.4; Total Alkalinity , The test range is 0-40-80-120-180-240. 2. Health test: it is recommended to test at both ends of the pool twice a week to obtain better results so that you can know whether the pool water is in a healthy and clean state; stripe design is an efficient and accurate method for testing water for both commercial and domestic applications. 3. Quick and accurate: The ideal water quality is based on an accurate water quality test. Take a test paper and immerse it in the swimming pool water for about 2 seconds, take it out and place it flat, and compare the reading with the color chart after 15 seconds. 4. Easy to Use and Read: Dip a pool test strip into water for 2s, then take it out, hold it horizontally for about 15s, compare with color chart on the bottle, and read the results within 30s, easy and fast. 5. Widely used: suitable for swimming pool, aquarium, sewage, tap water, drinking water, and other different water quality detection, effectively help you know the state of the water. Specification Material: PE Color: White Size: 9.5 x 3.5 cm Weight: 120 g Package Include: 2x box of Pool Test Strips