Where we mention this product

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  essentials

  Hardness Test Kits and Strips: What to Buy

  Extended range · Best for: Higher-range Hach drop kit for very hard water (20+ gpg) where the Model 5-B runs out of drops too quickly

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  essentials

  Water Softener Hardness Setting: What Number to Enter

  Best for: ±0.5 gpg precision

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  Signs of Hard Water in Your Home: 8 Symptoms + Test

  Pro pick — titration accuracy · Best for: When strips say 'hard' but you need a defensible number for sizing a softener or calling a plumber. Reads grains per gallon directly.