WeAQUA Water Hardness Test Kit - DoubleCheck 50 Strips - Hard Water Testing Kit – Tests Calcium & Magnesium (0–425 PPM) – for Tap, Well, Drinking, Pool, Spa & Dishwasher

• DOUBLE CHECK - Each tester strip is designed with two identical color pads. If the color of the pads differs after testing, it indicates that the test may not be reliable and a new test should be performed. • 50 WATER TEST STRIPS - Maximize the time between each purchase with the lowest cost-per-test water hardness test strips that are available. • LONGEST SHELF LIFE - Desiccant design forms a dry force shield around the strips which also prevents the strips from going bad due to too much contact with moisture. • EASILY THE MOST ACCURATE - DoubleCheck to weed out bad color pads, sample cup with pre-measured water level for the most optimum water to test strip ratio.