{"product_id":"calcium-hardness-increaser","title":"SpaGuard Calcium Hardness Increaser 12oz 42636BIO","description":"\u003ch2\u003e\u003cspan\u003eSpaGuard Calcium Hardness Increaser 12oz 42636BIO\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eProtect your spa surfaces and equipment with SpaGuard Calcium Hardness Increaser 12oz, a fast-dissolving granular formula that raises low calcium levels into the safe range to prevent corrosion and etching. Ideal for spas and hot tubs with soft or aggressive water, it steadily increases hardness without overshooting into scale-forming territory.\u003c\/p\u003e\n\u003cp\u003eKey Features \u0026amp; Benefits\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrevents corrosion damage: Raises low calcium levels that can otherwise cause corrosive water, leading to damage of plumbing, jets, heaters, fixtures, and spa surfaces.\u003c\/li\u003e\n\u003cli\u003eHelps avoid etching and pitting: Protects acrylic and plaster finishes from etching caused by water that is too soft or aggressive.\u003c\/li\u003e\n\u003cli\u003eSteady, controlled hardness increase: Easy-to-use granular formula increases hardness gradually, reducing the risk of scale buildup and cloudy water from too much calcium.\u003c\/li\u003e\n\u003cli\u003eSupports balanced water chemistry: Helps keep calcium hardness in the recommended range so your overall water balance (pH, alkalinity, LSI) stays more stable and easier to manage.\u003c\/li\u003e\n\u003cli\u003eConvenient spa-sized bottle: 12oz size is perfect for spas and hot tubs, making accurate dosing simple for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSpecifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct name: SpaGuard Calcium Hardness Increaser\u003c\/li\u003e\n\u003cli\u003eSize: 12oz bottle\u003c\/li\u003e\n\u003cli\u003eForm: Granular calcium hardness increaser\u003c\/li\u003e\n\u003cli\u003eActive ingredient: Primarily calcium chloride, with small amounts of sodium and potassium chloride.\u003c\/li\u003e\n\u003cli\u003eRecommended calcium hardness range: Typically 100–200 ppm for most spas; 200–300 ppm for spas on BioGuard SoftSoak programs.\u003c\/li\u003e\n\u003cli\u003eTypical dosage: 1 tablespoon per 100 gallons raises calcium hardness by about 25 ppm.\u003c\/li\u003e\n\u003cli\u003eApplication: With pump running on high speed, scatter directly over spa water; run pump for at least 30 minutes after addition. Do not pre‑dissolve, as the product generates heat when it contacts water.\u003c\/li\u003e\n\u003cli\u003eItem\/Ref #: 42636BIO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKeep a bottle of SpaGuard Calcium Hardness Increaser 12oz (42636BIO) on hand to quickly correct low hardness and help extend the life of your spa and equipment.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"BIOLAB, INC.","offers":[{"title":"Default Title","offer_id":47305267314988,"sku":"42636BIO","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/8594\/0780\/files\/51AXJJyBudL.jpg?v=1698229480","url":"https:\/\/www.budgetpools.com\/products\/calcium-hardness-increaser","provider":"Budget Pools","version":"1.0","type":"link"}