16 IN 1 Water Testing Kit: High sensitivity test strips to detect Hardness / pH / Fluoride / Lead / Mercury / Cooper / Nitrate / Nitrite / Residual chlorine / Total chlorine / Bromine / Carbonate / Total alkalinity / Zinc / Aluminum / Cyanuric Acid. Accurate And Reliable Results: Water test strips for home use. 50/100 Strips in one bottle,Save money. No expensive laboratory testing. Easy to Use: Dip the drinking water test paper into the water for 5 seconds, keep it in the air for about 30 seconds, and then adjust the color of the back of the bottle to get the reading. Even for beginners, drinking water test strips are easy to use. Health: Test strips are used for drinking water, faucets, well water, fresh water tanks and more water quality tests. Use professional drinking water test strips for health to test water quality standards. Multiple Uses: Test every water source around your home, including drinking, well and tap water, pool & spa, hot tub and aquarium.