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16 in 1 Home Water Testing Kits for Drinking Water -150 Strips for Swimming Pool, Aquarium, Spa, Tap, Well Water - Testing for pH, Lead, Hardness, Chlorine, Iron, Copper,etc

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All-New 20 in 1 Drinking Water Testing Kit 120 Strips, Home Tap and Well Water Test Kit for Hardness, Lead, Iron, Copper, Chlorine, Fluoride

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1 sodium carbonate is often added to laundry detergents to soften hard water and make the detergent more effective suppose that a particular detergent mixture is designed to soften hard wate 99569