{"product_id":"650g-calcium-hardness-increaser-27200c69-raise-spa-small-above-ground-pool-calcium-levels","title":"Calcium Hardness Increaser 650g  – 27200C69 | Raise Spa \u0026 Small Above Ground Pool Calcium Levels","description":"\u003cp data-start=\"146\" data-end=\"434\"\u003eProtect your spa or above ground pool from corrosion and surface damage with \u003cstrong data-start=\"229\" data-end=\"284\"\u003eCalcium Hardness Increaser 650g (Product #27200C69)\u003c\/strong\u003e. This fast-dissolving formula safely raises calcium hardness levels in spa and pool water, helping prevent foaming, etching, and equipment corrosion.\u003c\/p\u003e\n\u003cp data-start=\"436\" data-end=\"754\"\u003eBalanced calcium hardness is essential for protecting heaters, pumps, liners, and surfaces. If your water is too soft, it can become aggressive and start pulling minerals from metal components and pool finishes. This completely soluble formula makes adjustments simple — and you can swim immediately after application.\u003c\/p\u003e\n\u003chr data-start=\"756\" data-end=\"759\"\u003e\n\u003ch2 data-start=\"761\" data-end=\"776\"\u003e✔ Ideal For:\u003c\/h2\u003e\n\u003cul data-start=\"777\" data-end=\"869\"\u003e\n\u003cli data-start=\"777\" data-end=\"796\"\u003e\n\u003cp data-start=\"779\" data-end=\"796\"\u003eHot tubs \u0026amp; spas\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"797\" data-end=\"825\"\u003e\n\u003cp data-start=\"799\" data-end=\"825\"\u003eSmall above ground pools\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"826\" data-end=\"869\"\u003e\n\u003cp data-start=\"828\" data-end=\"869\"\u003eVinyl, fiberglass, and acrylic surfaces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"871\" data-end=\"874\"\u003e\n\u003ch2 data-start=\"876\" data-end=\"923\"\u003eHow Much Do You Need for Above Ground Pools?\u003c\/h2\u003e\n\u003cp data-start=\"925\" data-end=\"1093\"\u003e\u003cstrong data-start=\"925\" data-end=\"947\"\u003eGeneral Guideline:\u003c\/strong\u003e\u003cbr data-start=\"947\" data-end=\"950\"\u003eApproximately \u003cstrong data-start=\"964\" data-end=\"1004\"\u003e25 grams (1 capful) per 1,000 litres\u003c\/strong\u003e will raise calcium hardness incrementally. Always test water first and adjust gradually.\u003c\/p\u003e\n\u003cp data-start=\"1095\" data-end=\"1253\"\u003eBelow is an estimated bottle usage guide (based on increasing calcium hardness by approximately 50 ppm — exact amounts may vary depending on starting levels):\u003c\/p\u003e\n\u003ch3 data-start=\"1255\" data-end=\"1293\"\u003e8–10 ft Round Pool (5,000–8,000 L)\u003c\/h3\u003e\n\u003cul data-start=\"1294\" data-end=\"1362\"\u003e\n\u003cli data-start=\"1294\" data-end=\"1324\"\u003e\n\u003cp data-start=\"1296\" data-end=\"1324\"\u003eApprox. 125–200 g required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1325\" data-end=\"1362\"\u003e\n\u003cp data-start=\"1327\" data-end=\"1362\"\u003e\u003cstrong data-start=\"1327\" data-end=\"1362\"\u003e1 bottle treats 3–5 adjustments\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1364\" data-end=\"1402\"\u003e12 ft Round Pool (10,000–12,000 L)\u003c\/h3\u003e\n\u003cul data-start=\"1403\" data-end=\"1475\"\u003e\n\u003cli data-start=\"1403\" data-end=\"1433\"\u003e\n\u003cp data-start=\"1405\" data-end=\"1433\"\u003eApprox. 250–300 g required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1434\" data-end=\"1475\"\u003e\n\u003cp data-start=\"1436\" data-end=\"1475\"\u003e\u003cstrong data-start=\"1436\" data-end=\"1475\"\u003e1 bottle provides 2 full treatments\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1477\" data-end=\"1515\"\u003e15 ft Round Pool (15,000–18,000 L)\u003c\/h3\u003e\n\u003cul data-start=\"1516\" data-end=\"1585\"\u003e\n\u003cli data-start=\"1516\" data-end=\"1546\"\u003e\n\u003cp data-start=\"1518\" data-end=\"1546\"\u003eApprox. 375–450 g required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1547\" data-end=\"1585\"\u003e\n\u003cp data-start=\"1549\" data-end=\"1585\"\u003e\u003cstrong data-start=\"1549\" data-end=\"1585\"\u003e1 bottle provides 1–2 treatments\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1587\" data-end=\"1628\"\u003e18 ft+ Above Ground Pools (20,000+ L)\u003c\/h3\u003e\n\u003cul data-start=\"1629\" data-end=\"1698\"\u003e\n\u003cli data-start=\"1629\" data-end=\"1648\"\u003e\n\u003cp data-start=\"1631\" data-end=\"1648\"\u003e500 g+ required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1649\" data-end=\"1698\"\u003e\n\u003cp data-start=\"1651\" data-end=\"1698\"\u003eMay require \u003cstrong data-start=\"1663\" data-end=\"1698\"\u003e1–2 bottles per full adjustment\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1700\" data-end=\"1821\"\u003eFor larger above ground pools, purchasing multiple bottles may be necessary depending on how low your calcium levels are.\u003c\/p\u003e\n\u003chr data-start=\"1823\" data-end=\"1826\"\u003e\n\u003ch2 data-start=\"1828\" data-end=\"1843\"\u003eKey Benefits\u003c\/h2\u003e\n\u003cp data-start=\"1845\" data-end=\"2046\"\u003e✔ Raises calcium hardness quickly\u003cbr data-start=\"1878\" data-end=\"1881\"\u003e✔ Completely soluble formula\u003cbr data-start=\"1909\" data-end=\"1912\"\u003e✔ Safe to swim immediately after application\u003cbr data-start=\"1956\" data-end=\"1959\"\u003e✔ Protects heaters, pumps, and pool surfaces\u003cbr data-start=\"2003\" data-end=\"2006\"\u003e✔ Reduces corrosion and equipment wear\u003c\/p\u003e\n\u003chr data-start=\"2048\" data-end=\"2051\"\u003e\n\u003ch2 data-start=\"2053\" data-end=\"2074\"\u003eDirections for Use\u003c\/h2\u003e\n\u003col data-start=\"2076\" data-end=\"2331\"\u003e\n\u003cli data-start=\"2076\" data-end=\"2136\"\u003e\n\u003cp data-start=\"2079\" data-end=\"2136\"\u003eTest water to determine current calcium hardness level.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2137\" data-end=\"2185\"\u003e\n\u003cp data-start=\"2140\" data-end=\"2185\"\u003eFollow the chart on the back of the bottle.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2186\" data-end=\"2277\"\u003e\n\u003cp data-start=\"2189\" data-end=\"2277\"\u003eBroadcast \u003cstrong data-start=\"2199\" data-end=\"2239\"\u003e25 grams (1 capful) per 1,000 litres\u003c\/strong\u003e as required over spa or pool water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2278\" data-end=\"2331\"\u003e\n\u003cp data-start=\"2281\" data-end=\"2331\"\u003eAllow water to circulate fully before retesting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp data-start=\"2333\" data-end=\"2485\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eMaintaining proper calcium hardness extends the life of your spa or above ground pool equipment and ensures balanced, comfortable water all season long.\u003c\/p\u003e","brand":"PTL Direct","offers":[{"title":"Default Title","offer_id":47690963091594,"sku":"27200C69","price":9.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/0989\/9658\/files\/Calciumhardnessincreaserforspas650g.webp?v=1771259102","url":"https:\/\/www.poolstubsliners.com\/fr\/products\/650g-calcium-hardness-increaser-27200c69-raise-spa-small-above-ground-pool-calcium-levels","provider":"PTL Direct","version":"1.0","type":"link"}