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NEW Hach 5B Hardness Test Kit Cat.N 145300 INV=15020 - The purpose is to tell if the softener is doing something, but is. Use this kit to monitor water hardness levels and minimize scale buildup. It works much better than any test strips you can buy. Trust the original hach test kit! You should do a test with water that comes from before the softener. You should also read this: Does Aya Healthcare Drug Test
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