{"product_id":"durachlor-hardness-increaser-10lb-pool-calcium-hardness-c002711-cs74c1","title":"Haviland DuraChlor Hardness Increaser 10 lb Pail (C002711-CS74C1)","description":"\u003cp\u003eThe \u003cstrong\u003eDuraChlor Hardness Increaser 10 lb (C002711-CS74C1)\u003c\/strong\u003e by Haviland is a professional-grade pool water balancer formulated with \u003cstrong\u003e100% Calcium Di-Chloride\u003c\/strong\u003e. 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.\u003c\/p\u003e\n\n\u003ch4\u003e🚩 PRO TIP\u003c\/h4\u003e\n\u003cp\u003eMaintaining 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.\u003c\/p\u003e\n\n\u003ch4\u003ePRODUCT FEATURES\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRaises Calcium Hardness:\u003c\/strong\u003e Effectively increases calcium hardness to the ideal range of 200–400 ppm\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003ePrevents Corrosion:\u003c\/strong\u003e Protects pool equipment, heaters, and metal fittings from corrosive low-hardness water\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eProtects Pool Surfaces:\u003c\/strong\u003e Prevents pitting, etching, and erosion of plaster, concrete, and masonry pool surfaces\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003ePrevents Foaming:\u003c\/strong\u003e Proper calcium hardness reduces foaming in pool water\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eQuick-Dissolving Granular Formula:\u003c\/strong\u003e Fast-acting flake\/granule formula for easy broadcast application\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eExtends Pool Life:\u003c\/strong\u003e Balanced calcium hardness significantly extends the lifespan of pool surfaces and equipment\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Safe for all pool types — vinyl, fiberglass, and concrete\/plaster\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eTECHNICAL SPECIFICATIONS\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e DuraChlor by Haviland Consumer Products\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e C002711-CS74C1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 025551525130\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActive Ingredient:\u003c\/strong\u003e Calcium Di-Chloride — 100%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNet Weight:\u003c\/strong\u003e 10 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Granular Flakes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTarget Calcium Hardness Range:\u003c\/strong\u003e 200–400 ppm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDosage:\u003c\/strong\u003e Add 1.2 lbs per 10,000 gallons of pool water to raise calcium hardness by 10 ppm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Broadcast product over the surface of the water with the pump running. Allow to circulate for at least 2 hours before retesting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaged By:\u003c\/strong\u003e Haviland Consumer Products, Inc., 421 Ann St. NW, Grand Rapids, MI 49504\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWHY SHOP WITH AL'S COOL POOL STORE?\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Fast, reliable shipping on every order\u003c\/li\u003e\n  \u003cli\u003e✅ Genuine OEM and top-brand parts only\u003c\/li\u003e\n  \u003cli\u003e✅ Knowledgeable pool \u0026amp; spa experts ready to help\u003c\/li\u003e\n  \u003cli\u003e✅ Hassle-free returns and satisfaction guarantee\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Haviland","offers":[{"title":"Default Title","offer_id":44200994340999,"sku":"C002711-CS74C1","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0634\/1217\/4983\/files\/durachlor-hardness-increaser-c002711-cs74c1-10lb-pool-calcium-complete.png?v=1773524146","url":"https:\/\/alscoolpoolstore.com\/products\/durachlor-hardness-increaser-10lb-pool-calcium-hardness-c002711-cs74c1","provider":"Al's Cool Pool Store","version":"1.0","type":"link"}