100Pcs 3 In 1 Swimming Pool Test Strips Spa & hot tub Test Strips for Chlorine, PH and Alkalinity Testing

【Upgrade 3 in 1】:Used to test free chlorine/bromine, pH, total alkalinity, with anti-VC interference ability, fast and accurate test. 【Easy and accurate】: Just immerse a piece of test paper in water for about 2 seconds, take it out and lay it flat for about 15 seconds, and then check the result with the color card on the bottle. 【Health Test】: It is recommended to test at both ends of the pool twice a week to obtain the best results, so that you can know whether the pool water is in a healthy and clean state. 【Widely used】:Suitable for drinking water, aquariums, swimming pools, spas, etc. It can also be used to test the water in the hot tub and it will work normally. 【Easy to store】:The test paper is packed in a container that is easy to store to ensure long-term storage. Perfect swimming pool and spa test.