Enter the data and use the results to select the appropriate water softener or acid neutralizer below. 

About the Calculator

This data is used to predict the corrosiveness or scaling tendency of your water using Langlier’s Saturation Index (LSI) and Ryznar’s Stability Index (RSI).

This tool can reliably predict if you need a water softener or acid neutralizer based on your local water quality. This tool also calculates the suggested size of a softener you need.

LSI Deposit and Corrosion Calculator

Water Softener Calculator









Home Filtration Options

High Hardness Softeners

Water Softener for Family of 4+

100,000 grain capacity
PRO+AQUA Heavy Duty Whole House Well Water Filter System

Water Softener for Family of 4+

80,000 grain capacity
PRO+AQUA Whole House Water Softener High Demand Heavy Duty

Water Softener for Family of 4+

64,000 grain capacity
Aquasure Harmony Whole House Water Softener

Medium Hardness Softeners

Water Softener for Family of 1-6

40,000 grain capacity
Whirlpool WHES40E

Water Softener for Family of 1-3

18,000 grain capacity
Whirlpool WHES18

Acid Neutralizer

AFWFilters Acid Neutralizer Calcite Filter for pH boosting
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