50 Strips/Bottle50 water analysis test strips for drinking water test strips. Made from high quality imported filter paper. Different colors on the box and packaging allow precise and easy determination of measured values. 16 in 1 Drinking Water Test Strips Carbon Dioxide, Nitrite, Total Alkalinity. Multifunctional Test StripsTest strips are ideal for testing swimming pool, drinking water, hot tubs, well water, spas, aquariums and much more. It's very convenient to take it everywhere. You can know exactly how many chemicals are in your water. Quick Water TestImmerse the test strips with all colored fields in water for 5 seconds. Then hold it horizontally for 60 seconds, then compare it to the chart for reference, it's an easy way to test 16 parameters at a time. Storage Method For optimal results and long shelf life, store the product in a dry, cool, dark place. Do not touch the test strip areas; keep them away from light and humidity. After removing the strips, quickly replace the cap.