ANSWER Hi, each strip is dipped in the water to be tested and the strip will turn a different color based on the hardness of the water. There is a color scale included to compare the strip color to. Thank you.
Wasserstrom: A Trusted Family Name in Restaurant Supplies & Equipment
Headquartered in Columbus, Ohio, The Wasserstrom Company is the world's leading restaurant supplier and distributor of food service supplies and equipment. We carry the top brands from the industry's leading manufacturers.