{"product_id":"pool-mate-32-lb-calcium-hardness-increaser-for-pools-granular-formula-to-raise-stabilize-hardness","title":"Pool Mate 32 lb Calcium Hardness Increaser for Pools — Granular Formula to Raise \u0026 Stabilize Hardness","description":"\u003cp\u003e\u003cstrong\u003ePool Mate 32-pound Calcium Hardness Increaser is a dry granular calcium chloride formula designed to safely raise and stabilize your pool's calcium hardness to the recommended range.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMaintaining proper calcium hardness protects pool surfaces and equipment from the effects of water that's too soft. This concentrated, easy-to-dissolve granule lets you correct low hardness without adding unnecessary water volume. Use a reliable test kit first to confirm your current ppm, then follow the product's dilution and application guidance to bring levels into the ideal windows for different pool finishes.\u003c\/p\u003e\n\n\u003ch3\u003eHow quickly will this product change my pool's calcium hardness?\u003c\/h3\u003e\n\n\u003cp\u003eResults depend on pool size and how much product you dissolve, but the formula is designed to raise hardness efficiently when used as directed. For small adjustments, dissolving the correct amount in a bucket and distributing it around the pool while the pump runs is sufficient. For larger corrections, stage additions to avoid overshooting the target.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e8 ounces will raise calcium hardness approximately 10 ppm in 5,000 gallons of water.\u003c\/li\u003e\n  \u003cli\u003eDo not add more than 10 pounds to a 10,000-gallon pool within a 2-hour window.\u003c\/li\u003e\n  \u003cli\u003eDissolve product in a plastic bucket of pool water before adding to the pool.\u003c\/li\u003e\n  \u003cli\u003eCirculate water during and after application for even distribution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat levels should I aim for with different pool surfaces?\u003c\/h3\u003e\n\n\u003cp\u003eDifferent pool finishes require different calcium hardness ranges to minimize surface damage and staining. Vinyl typically requires lower hardness than plaster or exposed aggregate, while marcite, fiberglass and painted surfaces tend to need the highest recommended range. Test and adjust slowly to reach the appropriate window for your finish.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVinyl pools: aim for about 200–300 ppm.\u003c\/li\u003e\n  \u003cli\u003eTile and exposed aggregate: aim for about 200–400 ppm.\u003c\/li\u003e\n  \u003cli\u003eMarcite, fiberglass, painted pools: aim for about 250–400 ppm.\u003c\/li\u003e\n  \u003cli\u003eUse a reliable test kit to verify before and after treatment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I apply Pool Mate Calcium Hardness Increaser safely?\u003c\/h3\u003e\n\n\u003cp\u003eFollow safe dilution and application steps to prevent concentrated product from contacting pool surfaces directly. Always mix the recommended amount into a plastic bucket pre-filled with pool water and pour slowly around the pool perimeter while the circulation system runs. Avoid adding large amounts all at once in smaller pools.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse up to 2 pounds per approximately 5-gallon bucket of water for mixing.\u003c\/li\u003e\n  \u003cli\u003eSlowly pour the dissolved solution around the pool perimeter with the pump on.\u003c\/li\u003e\n  \u003cli\u003eDo not apply undissolved granules directly to the pool finish.\u003c\/li\u003e\n  \u003cli\u003eFor significant increases, spread additions over hours and retest between doses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill increasing calcium hardness affect other water chemistry readings?\u003c\/h3\u003e\n\n\u003cp\u003eRaising calcium hardness can influence overall water balance but doesn’t directly change sanitizer levels. However, altering one parameter can affect scale formation or corrosion potential, so recheck total alkalinity and pH after treatment. Balancing all parameters helps the pool perform best and protects surfaces and equipment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRetest pH and total alkalinity after adjusting hardness.\u003c\/li\u003e\n  \u003cli\u003eAdjust other sanitizers or treatments only if recommended by test results.\u003c\/li\u003e\n  \u003cli\u003eRegular monitoring prevents scale or etching caused by imbalanced water.\u003c\/li\u003e\n  \u003cli\u003eUse a complete test kit for accurate multi-parameter readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for? Pool Mate 32-Pounds Calcium Hardness Increaser is intended for pool owners and maintenance professionals who detect low calcium hardness and need a reliable, granular solution to bring levels into the recommended range. It’s suited to backyard vinyl, tile, exposed aggregate, marcite, fiberglass and painted pools; best used by anyone comfortable testing water, diluting chemicals in a bucket, and following staged dosing guidelines for safe, even results.\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 Pool Mate raises hardness in a 10,000-gallon pool?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: 8 ounces raises hardness about 10 ppm in 5,000 gallons; scale accordingly and avoid more than 10 pounds per 2 hours for a 10,000-gallon pool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I add the granules directly to the pool?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Always dissolve the granules in a plastic bucket of pool water and pour slowly around the perimeter with circulation on.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Pool Mate","offers":[{"title":"Default Title","offer_id":56843998691668,"sku":"B0CWVRCYZR","price":199.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/pool-mate-front-bag_781983ad-d9d9-407b-955b-15ca3c1987f7.jpg?v=1787083601","url":"https:\/\/gardenluxe.co.uk\/products\/pool-mate-32-lb-calcium-hardness-increaser-for-pools-granular-formula-to-raise-stabilize-hardness","provider":"Gardenluxe Uk","version":"1.0","type":"link"}