{"product_id":"pool-mate-calcium-hardness-increaser-granular-25-lb-fast-dissolving-stabilizes-pool-water","title":"Pool Mate Calcium Hardness Increaser Granular – 25 lb | Fast-Dissolving, Stabilizes Pool Water","description":"\u003cstrong\u003ePool Mate 25-Pounds Premium Calcium Hardness Increaser is a granular calcium chloride treatment designed to raise and stabilize the calcium hardness of pool water to recommended levels.\u003c\/strong\u003e\n\nMaintaining the right calcium hardness helps protect pool surfaces and equipment from damage caused by water that's too soft or too hard. This concentrated, fast-dissolving granular formula lets you correct low calcium levels safely when used with routine water testing and proper dilution. Follow the included dosing guidance and your pool circulation schedule for uniform distribution.\n\n\u003ch3\u003eHow quickly will Pool Mate adjust my pool’s calcium hardness?\u003c\/h3\u003e\n\u003cp\u003eResults are seen soon after the product is dissolved and circulated, but full stabilization may require a few hours of pump operation. Always pre-dissolve the granules in a plastic bucket of pool water before adding to the pool to prevent local staining or material stress.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-dilute up to 2 lb per roughly 5-gallon bucket of pool water.\u003c\/li\u003e\n  \u003cli\u003ePour solution slowly around pool perimeter while pump runs.\u003c\/li\u003e\n  \u003cli\u003eA 10,000-gallon pool: limit additions to 10 lb per two-hour period.\u003c\/li\u003e\n  \u003cli\u003eAllow circulation and retest after several hours for accurate levels.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat calcium ranges should I aim for with different pool finishes?\u003c\/h3\u003e\n\u003cp\u003eTarget hardness depends on your pool surface material; each finish tolerates different calcium concentrations. Use a reliable test kit and raise calcium to the recommended band for your pool type to reduce risks like etching or scaling.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVinyl pools: 200–300 ppm recommended range.\u003c\/li\u003e\n  \u003cli\u003eTile and exposed aggregate pools: 200–400 ppm recommended range.\u003c\/li\u003e\n  \u003cli\u003eMarcite, fiberglass, or painted surfaces: 250–400 ppm recommended range.\u003c\/li\u003e\n  \u003cli\u003eAdjust gradually and retest to avoid overshooting the target.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I add Pool Mate safely to the water?\u003c\/h3\u003e\n\u003cp\u003eDo not broadcast dry granules directly into the pool. Dissolve the measured product in a plastic bucket of pool water, then introduce that solution slowly while the circulation system operates to ensure even dispersion and minimize localized concentration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeasure product using the provided or referenced dosing chart.\u003c\/li\u003e\n  \u003cli\u003eUse a plastic bucket already filled with pool water for pre-dissolving.\u003c\/li\u003e\n  \u003cli\u003ePour the dissolved solution slowly around the pool perimeter with pump running.\u003c\/li\u003e\n  \u003cli\u003eWait and retest; for large pools, stage additions (e.g., ≤10 lb per 2 hours per 10,000 gallons).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill adding calcium affect other water chemistry parameters?\u003c\/h3\u003e\n\u003cp\u003eRaising calcium hardness changes only the hardness reading itself, but water chemistry is interconnected. After adjustment, check total alkalinity, pH, and sanitizer levels because they influence and are influenced by overall balance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRetest pH and alkalinity after calcium adjustments.\u003c\/li\u003e\n  \u003cli\u003eBalance chlorine or other sanitizers as needed following treatment.\u003c\/li\u003e\n  \u003cli\u003eIf hardness becomes too high, consult corrective options before draining or major interventions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\nThis 25-pound bag is aimed at pool owners and service professionals who test water regularly and want a dependable, easy-to-use option for correcting low calcium hardness. It’s suitable for vinyl, tile, aggregate, fiberglass, painted, and marcite finishes when dosed according to the recommendations. Use it as part of a routine maintenance plan to help protect surfaces and equipment, and always follow label instructions and local regulations when handling and storing pool chemicals.\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much calcium will 8 ounces raise?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: 8 ounces raises calcium hardness roughly 10 ppm in 5,000 gallons of water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I pour the granules directly into the pool?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — always pre-dissolve in a plastic bucket of pool water and add slowly with pump running.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Pool Mate","offers":[{"title":"Default Title","offer_id":56834999746900,"sku":"B0CWVR71TS","price":131.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/pool-mate-front-packaging_eb45bc14-5b5d-4217-af1f-ee955130f3f9.jpg?v=1787054991","url":"https:\/\/gardenluxe.co.uk\/products\/pool-mate-calcium-hardness-increaser-granular-25-lb-fast-dissolving-stabilizes-pool-water","provider":"Gardenluxe Uk","version":"1.0","type":"link"}