{"product_id":"clorox®-pool-spa™-calcium-hardness-increaser-for-safe-pool-equipment-protection-non-corrosive-water-balancer-for-plaster-pools","title":"Clorox® Pool\u0026Spa™ Calcium Hardness Increaser for Safe Pool Equipment Protection, Non-Corrosive Water Balancer for Plaster Pools","description":"\u003cdiv class=\"geo-product-body\"\u003e\n\u003csection class=\"geo-appeal\"\u003e\u003ch2\u003eWhy you'll love it\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTrusted Clorox brand credibility in water care provides confidence over generic alternatives\u003c\/li\u003e\n\u003cli\u003ePrevents expensive damage to pool surfaces, heaters, and metal fittings from corrosive low-hardness water\u003c\/li\u003e\n\u003cli\u003eCompanion Clorox Pool App delivers personalized dosage and testing guidance for accurate treatment\u003c\/li\u003e\n\u003cli\u003eGranular formula is easy to measure and broadcast directly into the pool without pre-mixing\u003c\/li\u003e\n\u003cli\u003eSpecifically formulated to be effective in soft water regions where calcium deficiency is a chronic issue\u003c\/li\u003e\n\u003cli\u003eMulti-pack (3-pack) option reduces cost per treatment and minimizes reordering frequency\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"geo-usecases\"\u003e\u003ch2\u003ePerfect for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRaising low calcium hardness levels in pool water after refill or seasonal opening\u003c\/li\u003e\n\u003cli\u003ePreventing corrosion of metal pool equipment, heaters, and ladders caused by soft water\u003c\/li\u003e\n\u003cli\u003eStopping etching and staining on plaster pool surfaces and tile\u003c\/li\u003e\n\u003cli\u003eRoutine water balancing maintenance to extend pool surface and equipment lifespan\u003c\/li\u003e\n\u003cli\u003eRestoring water chemistry in plaster pools located in soft-water geographic areas\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"geo-original\"\u003e\u003cdiv style=\"margin-bottom: 20px;\"\u003e\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/d06e6336-2a6c-4245-830a-395773a1c2b4.__CR0,0,1529,473_PT0_SX970_V1___.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px;\"\u003e\n\u003ch3\u003eFor Beautiful, Comfortable Water\u003c\/h3\u003e\n\u003cp\u003eBalanced pool water prevents skin and eye irritation, and extends the life of equipment by protecting surfaces from corrosion, scale and stains. Balancers help to restore water parameters to their ideal ranges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px;\"\u003e\n\u003cdiv style=\"display: flex; gap: 10px;\"\u003e\n\u003cdiv style=\"flex: 1 1 0%;\"\u003e\n\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/8bf39c60-1af6-4f24-9b63-d9e750fcce8b.__CR0,0,500,500_PT0_SX220_V1___.png\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003ePreserves Pool \u0026amp; Equipment\u003c\/h4\u003e\n\u003cp\u003eProtects pool equipment and surfaces from the effects of unbalanced water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 0%;\"\u003e\n\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/9b8a7b5d-da4d-4dc8-9af0-8bb664801a8f.__CR0,0,500,500_PT0_SX220_V1___.png\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eProtects Surfaces\u003c\/h4\u003e\n\u003cp\u003ePrevents corrosion, etching and staining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px;\"\u003e\n\u003cdiv style=\"display: flex; gap: 10px;\"\u003e\n\u003cdiv style=\"flex: 1 1 0%;\"\u003e\n\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/822520eb-9810-4a7d-82f2-34b8caff25c4.__CR0,0,768,768_PT0_SX300_V1___.jpg\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eTest Weekly\u003c\/h4\u003e\n\u003cp\u003eYour pool chemistry can change quickly. Test your pool water weekly to ensure your chlorine and pH remain within optimal swimming levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 0%;\"\u003e\n\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/6df8b409-4756-4091-ae29-3a3b949d23cb.__CR0,0,768,768_PT0_SX300_V1___.jpg\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eBrush \u0026amp; Clean\u003c\/h4\u003e\n\u003cp\u003eBrush, vacuum and skim water surface weekly to remove dirt and debris.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 0%;\"\u003e\n\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/41fab816-2606-4f31-8149-569b72065de8.__CR0,0,768,768_PT0_SX300_V1___.jpg\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eBalance Water\u003c\/h4\u003e\n\u003cp\u003eEnsure your water parameters are balanced to their ideal ranges for optimal swimmer comfort and surface and eqipment protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 20px;\"\u003e\u003cimg style=\"width: 100%;\" src=\"https:\/\/m.media-amazon.com\/images\/S\/aplus-media\/vc\/3c55c4b4-f4e0-4981-91c5-3bf91dc665bc.__CR0,0,1529,473_PT0_SX970_V1___.png\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003cb\u003eProduct Information\u003c\/b\u003e\u003cbr\u003ePrevents Corrosion, Etching, and Staining: With Clorox Pool\u0026amp;Spa Swimming Pool Calcium Hardness Increaser, you can safeguard your pool against corrosion, etching, and staining, ensuring its longevity and pristine appearance. Our product offers reliable protection, giving you peace of mind while you enjoy your pool.\u003cbr\u003e\u003cbr\u003eIncreases Low Total Hardness Levels: This product helps increase the low total hardness levels in swimming pool water, ensuring a balanced and stable environment for your pool. It restores water parameters to their ideal ranges.\u003cbr\u003e\u003cbr\u003eExtends Equipment Life: Unbalanced water can cause a corrosive environment that damages your pool surfaces or equipment. This product prevents pool surface damage, reduces pool maintenance, extending the life of your pool's cleanliness.\u003cbr\u003e\u003cbr\u003eCompatibility: Our Clorox Pool\u0026amp;Spa Swimming Pool Calcium Hardness Increaser is ideal for plaster pools and areas with soft water.\u003cbr\u003e\u003cbr\u003eClorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.\u003cbr\u003eClorox Pool\u0026amp;Spa Swimming Pool Calcium Hardness Increaser, Prevents Corrosion, Etching and Staining, 4LB (Pack of 1);12204CLX.Global Trade Identification Number: 00810821023108\u003cbr\u003eNumber of Items: 1\u003cbr\u003eItem Type Name: Calcium Hardness Increaser, 4 lb.\u003cbr\u003eIncluded Components: Includes: 1 x Pool\u0026amp;Spa 12204CLX Calcium Hardness Increaser, 4 lb\u003cbr\u003eItem Form: Granular\u003cbr\u003eProduct Benefits: Staining Prevents,Corrosion,Prevents Corrosion\u003cbr\u003eItem Weight: 4 pounds\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"geo-faq\"\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does raising calcium hardness actually protect my pool equipment from corrosion?\u003c\/h3\u003e\n\u003cp\u003eWhen calcium hardness is too low, water becomes aggressive and leaches minerals from metal components like heaters, ladders, and fittings. Raising hardness to the recommended range makes the water balanced and non-corrosive, extending equipment life and preventing costly replacements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this product safe to handle around children and pets during routine pool maintenance?\u003c\/h3\u003e\n\u003cp\u003eWhen used as directed and stored in its original sealed container, the granular formula is safe for residential use around kids and pets. Always follow Clorox Pool App dosage instructions and keep the container closed and out of reach when not in use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill this calcium increaser damage my pool heater if my hardness levels are already borderline?\u003c\/h3\u003e\n\u003cp\u003eNo, when dosed according to your test results via the Clorox Pool App, it brings hardness into the ideal balanced range without overshooting. Proper testing before each application prevents any risk to the heater or other equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I use this to prevent etching on my plaster pool surface before it becomes a safety concern?\u003c\/h3\u003e\n\u003cp\u003eYes, raising calcium hardness stops the chemical process that causes etching and staining on plaster and tile. Early treatment prevents the surface degradation that can create rough spots and sharp edges in the pool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eDoes the Clorox brand name on this product mean I can trust it for safe, balanced water chemistry?\u003c\/h3\u003e\n\u003cp\u003eYes, Clorox Pool and Spa is a trusted name in pool water care with established quality standards. The brand credibility provides confidence that you are using a reliably formulated product rather than an unverified generic alternative.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this safe to use in a pool where my kids swim every day?\u003c\/h3\u003e\n\u003cp\u003eYes, once the granular calcium chloride is fully dissolved and circulated through the pool water, it is safe for routine swimming. The Clorox Pool App provides dosage guidance so you reach the proper hardness level without overcorrection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill adding this product eliminate the need to replace corroded metal pool components?\u003c\/h3\u003e\n\u003cp\u003eIn many cases, yes. By stopping ongoing corrosion from low-hardness water, this increaser prevents the conditions that damage heaters, ladders, and fittings, often eliminating the need for premature equipment replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this product safer for my pool plaster than muriatic acid-based hardness adjusters?\u003c\/h3\u003e\n\u003cp\u003eYes, calcium chloride increaser is a much safer and more targeted way to raise hardness than attempting to adjust with acid-based products, which can lower pH unpredictably and create new water balance problems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does Clorox calcium increaser compare to generic calcium chloride from a hardware store?\u003c\/h3\u003e\n\u003cp\u003eIt offers Clorox brand quality control, companion app integration for accurate dosing, and formulation testing specifically for soft water region pool use, whereas generic products may vary in purity and offer no dosing support.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does this compare to using a pool calcium supplement versus ignoring the problem?\u003c\/h3\u003e\n\u003cp\u003eIgnoring low hardness leads to corrosion, etching, and staining that costs hundreds to thousands in equipment and surface repairs. The calcium supplement is a low-cost preventive measure that avoids those expensive outcomes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eI'm worried this will raise my pH and throw off the rest of my water chemistry. Is that a real risk?\u003c\/h3\u003e\n\u003cp\u003eCalcium chloride has a near-neutral effect on pH when dosed properly, so it should not significantly shift your pH balance. The Clorox Pool App helps you verify all parameters after treatment to confirm balanced water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat if I accidentally add too much? Can it damage my pool surface?\u003c\/h3\u003e\n\u003cp\u003eExcessively high hardness can cause calcium scaling on plaster and tile. Always test current hardness before adding the product and follow the Clorox Pool App dosage for your specific pool size to avoid overcorrection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs it worth the cost compared to just refilling the pool when water gets aggressive?\u003c\/h3\u003e\n\u003cp\u003eNo, frequent draining and refilling wastes water and money. A single calcium hardness treatment is far more cost-effective than repeated refills, and it preserves your plaster surface and equipment throughout the season.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow do I add calcium hardness increaser to my pool step by step?\u003c\/h3\u003e\n\u003cp\u003eFirst, test your current calcium hardness level with a reliable test kit. Calculate the dosage needed using the Clorox Pool App based on your pool size and current reading. Broadcast the granular product evenly across the pool surface with the pump running, then allow 4 to 6 hours of circulation. Retest to confirm the level is in the ideal range of 200 to 400 ppm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow often should I test and add calcium hardness to maintain balanced water?\u003c\/h3\u003e\n\u003cp\u003eTest calcium hardness at the start of the season, after each refill, and monthly during the swim season. In soft water regions, evaporation and refill cycles can drop hardness quickly, so more frequent testing may be needed. The Clorox Pool App can send reminders and adjust dosage recommendations based on your readings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I apply calcium increaser at the same time as other pool chemicals?\u003c\/h3\u003e\n\u003cp\u003eIt is best to add calcium increaser separately from other treatments and allow it to fully circulate and dissolve before adding additional chemicals. Always follow the Clorox Pool App sequencing guidance and test all parameters between treatments to avoid unwanted chemical interactions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this product compatible with salt water chlorine generators?\u003c\/h3\u003e\n\u003cp\u003eYes, calcium chloride increaser is fully compatible with salt water pool systems, plaster finishes, vinyl liners, and standard chlorine or bromine sanitation. The Clorox Pool App can confirm compatibility with your specific setup and equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eDoes this work with all pool sizes from small spas to large commercial pools?\u003c\/h3\u003e\n\u003cp\u003eYes, the granular formula scales by dose. For small spas, hot tubs, and above-ground pools, a small portion of the 4-pound bag is sufficient. For large commercial or resort pools, the 3-pack provides enough product to treat full-volume water with multiple follow-up doses as needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat exactly comes in the box when I order this product?\u003c\/h3\u003e\n\u003cp\u003eYou receive one or three 4-pound containers of Clorox Pool and Spa Swimming Pool Calcium Hardness Increaser in granular form, each in a sealed, labeled container with usage instructions. You will need a calcium hardness test kit, which is sold separately, and a compatible smartphone to access the Clorox Pool App for personalized dosage guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs calcium chloride safe to use around landscaping and grass near the pool?\u003c\/h3\u003e\n\u003cp\u003eWhen broadcast directly into the pool water and not onto surrounding lawn or plants, calcium chloride is safe for typical residential landscaping. Avoid letting undissolved granules sit on grass or garden beds, as concentrated salt can cause localized burn spots on sensitive vegetation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow long does it take to see results after adding calcium hardness increaser?\u003c\/h3\u003e\n\u003cp\u003eMost pools reach fully balanced hardness within 4 to 6 hours of circulation after application, though the Clorox Pool App recommends retesting at 24 hours to confirm a stable reading and to verify that pH, alkalinity, and hardness are all in their ideal ranges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between calcium hardness increaser and a general pool water balancer?\u003c\/h3\u003e\n\u003cp\u003eCalcium hardness increaser is specifically formulated to raise only the calcium hardness parameter, addressing soft or aggressive water. General pool balancers often adjust pH, alkalinity, or sanitizer levels but do not reliably raise calcium hardness, making this product a targeted solution for low-hardness conditions in soft water regions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Knacklos","offers":[{"title":"1 Count (Pack of 3)","offer_id":43562329342042,"sku":"BUHB0FVNS9RSK","price":43.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/7969\/9034\/files\/4-pound-granular-calcium-chloride-increaser-formula-1.jpg?v=1782564420","url":"https:\/\/knacklos.myshopify.com\/products\/clorox%c2%ae-pool-spa%e2%84%a2-calcium-hardness-increaser-for-safe-pool-equipment-protection-non-corrosive-water-balancer-for-plaster-pools","provider":"Knacklos","version":"1.0","type":"link"}