Dosage: Calcium hardness in pool water should be maintained in the 175-275 ppm range.
Never allow calcium hardness to remain below 100 ppm. Add HARDNESS TREATMENT directly to pool water by scattering it over the water surface. Do not pre-dissolve this treatment as heat is generated when this product contacts water. Use a surface compatible
brush to brush away un-dissolved granules off pool surfaces. The addition of 4 lbs. per 10,000 gallons of water will raise calcium hardness approximately 40 ppm. The addition of 10 lbs. per 10,000 gallons of water will raise calcium hardness approximately
100 ppm.
Description: This product is used to raise calcium hardness in swimming pool water. Low
calcium hardness causes pool water to be corrosive and may result in staining,
etching or distorting of the pool's finish. Plaster etched by low calcium
hardness will become abrasive and uncomfortable for swimmers. Rough plaster
increases algae problems and makes cleaning more difficult.
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