50 Strips/Bottle This bottle contains 50 strips designed for the analysis of drinking water. Crafted from high-quality imported filter paper, the varying colors on the boxes and packaging facilitate accurate measurement and assessment. 16 in 1 Drinking Water Test Paper for Carbon Dioxide, Nitrites, Total Alkalinity. Multifunctional Test Strips These strips are ideal for assessing swimming pools, drinking water, hot tubs, well water, spas, aquariums, and more. Their compact size makes them easy to carry, allowing you to determine the chemical levels in your water effortlessly. Rapid Water Test Submerge the test strip, ensuring all color areas are in the water for 5 seconds. Hold it for 60 seconds before comparing the results to the reference chart, providing a straightforward method to test 16 parameters at once. Storage Method To achieve optimal results and extend shelf life, store the product in a cool, dry, and dark environment. Avoid touching the test areas of the strip, and keep them away from light and moisture. Ensure to quickly replace the cover after removing the tape.