Free Hard Water Test | Water Hardness Test Strips -
The color of your test strip and the corresponding number indicates how hard your water is. Water hardness levels are measured in grains per gallon (gpg). If your number is 7 or higher, a water softener is recommended. If your home’s water tests in the 0-3 grains per gallon (gpg) range, a water softener is not needed as you are already enjoying soft water in your home.
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