Haviland DuraChlor Hardness Increaser 25 lb Pail (C002711-PL25)

The DuraChlor Hardness Increaser 25 lb (C002711-PL25) by Haviland is a professional-grade pool water balancer formulated with 100% Calcium Di-Chloride. This fast-dissolving granular formula safely and effectively raises calcium hardness levels in swimming pool water, protecting pool surfaces, equipment, and plaster from the corrosive effects of soft, low-hardness water. Maintaining proper calcium hardness is essential for the long-term health of any pool.

🚩 PRO TIP

Maintaining proper hardness levels can reduce surface pitting and etching of plaster, masonry, and concrete pools. Keep calcium hardness between 200–400 ppm. Test your water monthly and after heavy rainfall or significant water replacement, as dilution can lower hardness levels quickly.

PRODUCT FEATURES

• ✅ Raises Calcium Hardness: Effectively increases calcium hardness to the ideal range of 200–400 ppm
• ✅ Prevents Corrosion: Protects pool equipment, heaters, and metal fittings from corrosive low-hardness water
• ✅ Protects Pool Surfaces: Prevents pitting, etching, and erosion of plaster, concrete, and masonry pool surfaces
• ✅ Prevents Foaming: Proper calcium hardness reduces foaming in pool water
• ✅ Quick-Dissolving Granular Formula: Fast-acting flake/granule formula for easy broadcast application
• ✅ Extends Pool Life: Balanced calcium hardness significantly extends the lifespan of pool surfaces and equipment
• ✅ Universal Compatibility: Safe for all pool types — vinyl, fiberglass, and concrete/plaster

TECHNICAL SPECIFICATIONS

• Brand: DuraChlor by Haviland Consumer Products
• Part Number: C002711-PL25
• UPC: 025551352514
• Active Ingredient: Calcium Di-Chloride — 100%
• Net Weight: 25 lb
• Form: Granular Flakes
• Target Calcium Hardness Range: 200–400 ppm
• Dosage: Add 1.2 lbs per 10,000 gallons of pool water to raise calcium hardness by 10 ppm
• Application: Broadcast product over the surface of the water with the pump running. Allow to circulate for at least 2 hours before retesting.
• Packaged By: Haviland Consumer Products, Inc., 421 Ann St. NW, Grand Rapids, MI 49504

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