Water softeners filter out heavy metals, chlorine, iron, ... You may also see your water hardness measured in GPG (grain per gallon) or mg/L (milligrams per liter). Best Overall: GE GXSH40V Water ...

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1. An average softener with 1 cu. ft. of resins (30,000 grain, 10 ” x 44 ” tank) should use about 6-8 lbs. per regeneration to achieve an economical 24,000 grain capacity (hardness in grains divided ...