Varify Water Hardness Test Kit - Water Testing Kit for Home, Drinking, Well, Spa, Swimming Pool, Softener, Dishwasher & More - Hard Water Test Strips for Calcium, Magnesium etc (0-425 pmm, 150 Strips) is a Test Measure & Inspect option for everyday use, business supply needs, resale shelves, or household stocking. Review product size, pack count, and shipping details before checkout.