If detection of Zinc is what you need, this is the answer. WaterWorks Zinc Check II for water quality testing is designed to specifically react with Zinc. Say goodbye to dangerous, time-consuming wet-chemical kits that require extensive training and cost. This patented test is a simple dip-and-read water quality test procedure that requires no technical training. Additionally, since there is no glass required to run the test, it is ideal for use in controlled areas. Simply dip one strip into the water for 3 seconds, remove the strip and shake once to remove excess water, wait 20 seconds for the color to develop, and match with the closest color match to determine your concentration of Zinc. Additional Details ------------------------------ Product description: If detection of Zinc is what you need, this is the answer. WaterWorks Zinc Check II for water quality testing is designed to specifically react with Zinc. Say goodbye to dangerous, time-consuming wet-chemical kits that require extensive training and cost. This patented test is a simple dip-and-read water quality test procedure that requires no technical training. Additionally, since there is no glass required to run the test, it is ideal for use in controlled areas. Simply dip one strip into the water for 3 seconds, remove the strip and shake once to remove excess water, wait 20 seconds for the color to develop, and match with the closest color match to determine your concentration of Zinc.