LandscapingCalc

Calcium hardness calculator

PRO

Calcium chloride to raise calcium hardness.

Inputs

Pool volume

gal

Current CH

ppm

Target CH

ppm

Result

Calcium chloride

25.00 lb

+100 ppm CH

Pro calculator

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The formula

lb ≈ (gal/10k) × (ΔCH/10) × 1.25.

Worked example

20,000 gal, +100 ppm CH = 25 lb calcium chloride.

Frequently asked

›Target CH?

200–400 ppm for plaster pools; 150–250 for vinyl/fiberglass.