{"product_id":"spachoice-pool-calcium-chloride-granular-25-lb-fast-dissolving-calcium-increaser-for-pools","title":"SpaChoice Pool Calcium Chloride Granular 25 lb — Fast-Dissolving Calcium Increaser for Pools","description":"\u003cstrong\u003eSpaChoice 25-Pounds Premium Increase Calcium is a granular calcium chloride used to raise and stabilize pool water calcium hardness to recommended levels.\u003c\/strong\u003e\n\n\u003cp\u003eKeeping calcium hardness in the correct range helps preserve pool finishes and equipment. This concentrated granular formula dissolves in water and is applied around the pool while the circulation system runs. Test your pool’s calcium hardness with a reliable kit first, then follow the product dosing chart and mixing steps for even distribution and safe results.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use this calcium increaser correctly?\u003c\/h3\u003e\n\u003cp\u003eMeasure your pool’s current calcium hardness, determine the pounds needed from the included chart, then pre-dissolve the product in a plastic bucket of pool water. Pour the solution slowly around the pool perimeter while the pump is running to ensure even circulation and prevent local high concentrations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-dissolve up to 2 lb per 5-gallon bucket of pool water.\u003c\/li\u003e\n  \u003cli\u003eSlowly pour along the pool edge while the filter is operating.\u003c\/li\u003e\n  \u003cli\u003eWait and retest hardness after full circulation time before adding more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are safe dosing limits and timing for a typical pool?\u003c\/h3\u003e\n\u003cp\u003eFollow the package chart for accurate dosing based on pool volume and current hardness. For a 10,000 gallon pool, do not add more than 10 pounds within any 2-hour period to avoid sudden spikes; allow the water to circulate and mix before additional treatments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e8 ounces increases hardness ~10 ppm per 5,000 gallons (approximate).\u003c\/li\u003e\n  \u003cli\u003eMaximum recommended pace: 10 lb per 2 hours for 10,000 gallons.\u003c\/li\u003e\n  \u003cli\u003eRetest hardness after circulation to confirm target range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich hardness range should I aim for by pool type?\u003c\/h3\u003e\n\u003cp\u003eTarget calcium hardness varies by surface. Vinyl pools generally need slightly lower levels than plaster or exposed-aggregate surfaces; follow these ranges to protect surfaces from etching or scaling and to maintain balanced water chemistry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVinyl pools: 200–300 ppm.\u003c\/li\u003e\n  \u003cli\u003eTile and exposed aggregate: 200–400 ppm.\u003c\/li\u003e\n  \u003cli\u003eMarcite, fiberglass, painted pools: 250–400 ppm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this product help pool maintenance overall?\u003c\/h3\u003e\n\u003cp\u003eMaintaining recommended calcium hardness reduces the risk of surface damage and helps water remain chemically balanced, protecting heaters, pumps, and finishes. This product quickly raises hardness so you can correct low-calcium conditions and then fine-tune with routine testing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRapidly increases total hardness to target ranges.\u003c\/li\u003e\n  \u003cli\u003eReduces potential for surface staining, etching, or corrosion.\u003c\/li\u003e\n  \u003cli\u003eWorks with standard pool circulation systems for even distribution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Pool owners and maintenance professionals who need a reliable, concentrated calcium chloride product to correct low hardness in residential or commercial pools. It’s suitable for all common pool finishes when used according to directions and after confirming current hardness with a test kit. Always follow label instructions, wear appropriate PPE when handling granular chemicals, and add the pre-dissolved solution gradually while the pool is circulating.\u003c\/p\u003e\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 will one 8-ounce dose raise hardness?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Approximately 10 ppm of calcium hardness per 5,000 gallons, approximate; test after dosing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I add the powder directly to the pool?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — dissolve in a plastic bucket of pool water and pour slowly around the pool while circulating.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SpaChoice","offers":[{"title":"Default Title","offer_id":56833996292436,"sku":"B0C112GPTJ","price":159.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/spachoice-calcium-increaser-front-bag.jpg?v=1787046190","url":"https:\/\/gardenluxe.co.uk\/products\/spachoice-pool-calcium-chloride-granular-25-lb-fast-dissolving-calcium-increaser-for-pools","provider":"Gardenluxe Uk","version":"1.0","type":"link"}