{"product_id":"pool-mate-25-pounds-premium-calcium-hardness-increaser-rapidly","title":"Pool Mate 25-Pounds Premium Calcium Hardness Increaser - Rapidly","description":"\u003cp\u003eIn this review the Pool Mate 25-Pounds Premium Calcium Hardness Increaser is assessed for pool owners who need a reliable way to bring low calcium levels into the recommended range. The bottom line: it is a straightforward, granular \u003cstrong\u003ecalcium chloride\u003c\/strong\u003e product that dissolves quickly and raises total hardness effectively when used as directed, making it a practical choice for vinyl, tile, fiberglass and painted pools that show signs of low hardness or early etching.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% calcium chloride:\u003c\/strong\u003e A pure formulation that targets calcium hardness without adding unnecessary additives, helping restore the recommended hardness range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapidly increases hardness:\u003c\/strong\u003e The granular formula dissolves quickly so users see measurable changes after treatment and circulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents corrosion and etching:\u003c\/strong\u003e Proper calcium levels reduce the risk of surface etching and metal corrosion caused by soft water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy dosing guidance:\u003c\/strong\u003e The product includes a chart and clear bucket-dilution instructions for safe application to avoid overfeeding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise strength:\u003c\/strong\u003e 8 ounces raises calcium hardness about 10 ppm per 5,000 gallons, allowing controlled adjustments for most residential pools.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is best for homeowners and maintenance technicians who regularly test water and need to correct low calcium hardness in vinyl, tile, exposed aggregate, marcite, fiberglass or painted pools. It fits well into a routine water balance regimen when paired with a reliable test kit and functioning circulation system.\u003c\/p\u003e\u003cp\u003eIt is not ideal for users who do not test water or who are unwilling to follow dilution and dosing instructions; those users should seek professional pool service or a pre-measured system if they need hands-off maintenance. Also, users with extremely small or very large specialty commercial systems should consult specific recommendations before use.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEffective at raising calcium hardness to the recommended range when dosed correctly.\u003c\/li\u003e\n\u003cli\u003eGood value for the amount provided, offering predictable ppm increases per 8 ounces.\u003c\/li\u003e\n\u003cli\u003eDissolves quickly and works even in cooler water, so treatment can be completed without long delays.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users report difficulty opening the container lid, making first use inconvenient.\u003c\/li\u003e\n\u003cli\u003eRequires careful measuring and dilution; incorrect dosing can lead to uneven hardness results.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCalcium hardness increaser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight\u003c\/td\u003e\n\u003ctd\u003e25 pounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive ingredient\u003c\/td\u003e\n\u003ctd\u003e100% calcium chloride\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDosage guidance\u003c\/td\u003e\n\u003ctd\u003e8 oz raises 10 ppm per 5,000 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication form\u003c\/td\u003e\n\u003ctd\u003eDry granular, dissolve in bucket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended hardness\u003c\/td\u003e\n\u003ctd\u003eVinyl 200-300 ppm; Tile\/aggregate 200-400 ppm; Fiberglass\/paint 250-400 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Pool Mate 25-Pounds Calcium Hardness Increaser is a reliable, cost-effective option for pool owners who test and manage their water chemistry. It delivers fast, measurable increases in hardness and helps prevent surface etching when used with the included dilution and dosing instructions, making it a practical purchase for most residential pools.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow much does 8 ounces change hardness?\u003c\/strong\u003e\u003cbr\u003eAbout 10 ppm per 5,000 gallons when added and circulated as directed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow should it be added to the pool?\u003c\/strong\u003e\u003cbr\u003eDissolve in a plastic bucket of pool water (up to 2 lb per 5-gallon bucket) and slowly pour around the pool while the pump runs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich pools need this product?\u003c\/strong\u003e\u003cbr\u003eUse for vinyl, tile, exposed aggregate, marcite, fiberglass or painted pools that test below the recommended calcium hardness ranges.\u003c\/p\u003e","brand":"Pool Mate","offers":[{"title":"Default Title","offer_id":48179765903579,"sku":"B0CWVR71TS","price":41.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71FDXA6r7iL._AC_SL1500.jpg?v=1769489543","url":"https:\/\/gearmusthave.com\/products\/pool-mate-25-pounds-premium-calcium-hardness-increaser-rapidly","provider":"GearMustHave","version":"1.0","type":"link"}