2Pack 6 In 1 Swimming Pool PH Test Paper Value Alkalinity Hardness Test Strip Description Test water quality Help test the pH of water to indicate the acidity or alkalinity of a substance. Ideal for monitoring water quality and identifying potential pollution. High precision and fast reading The paper is made of high-quality pH test paper, which is very accurate and reliable, and responds quickly within 5 seconds. Easy to use, just immerse the test strip in the test solution for a few seconds to get the pH. It is ideal for testing human pH, drinking water, swimming pools, hot springs, aquariums, science education, laboratory use, hydroponics, etc. Easy to test: free chlorine/bromine, pH, total alkalinity. Easy to distinguish: the color difference is obvious, easy to compare the color of the strip with the color table. Test on both ends of the pool twice a week for best results. Immerse in water for instant reading, and put in a container that is easy to store. specification: Project Type: Swimming Pool SPA Test Strip Material: paper Color as shown Quantity: 50 sheets/bottle note: No retail packaging Due to manual measurement, please allow an error of 0-1 cm. Make sure you dont mind before bidding. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you The package includes: 2 Pack PH test paper