{"product_id":"clorox®-pool-spa™-calcium-hardness-increaser-for-aesthetic-plaster-pool-preservation-keeps-tile-and-surface-looking-new-4lb","title":"Clorox® Pool\u0026Spa™ Calcium Hardness Increaser for Aesthetic Plaster Pool Preservation, Keeps Tile and Surface Looking New 4LB","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\u003eWill this calcium increaser prevent the white etching marks I see developing on my pool tile?\u003c\/h3\u003e\n\u003cp\u003eYes, low calcium hardness is the primary cause of etching and staining on plaster and tile surfaces. Raising hardness to the ideal range stops the chemical action that creates those marks and preserves the clean, finished look of your pool surround.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan this product keep my pool surface looking new as part of my overall backyard aesthetic?\u003c\/h3\u003e\n\u003cp\u003eYes, by preventing etching, staining, and surface degradation, it preserves the smooth plaster finish and tile color that define the visual appeal of your outdoor living space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eDoes preventing metal corrosion help maintain the look of my pool ladder and fixtures?\u003c\/h3\u003e\n\u003cp\u003eYes, balanced hardness water stops the corrosive action that causes ladders, handrails, and metal fittings to develop rust-colored staining, which protects both function and the polished look of your pool hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill the Clorox brand reputation matter for someone who values quality in every detail of my home?\u003c\/h3\u003e\n\u003cp\u003eYes, Clorox Pool and Spa carries a recognized standard of quality, giving you confidence that the product will perform as expected and protect the finishes and surfaces you have invested in for your outdoor space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan proper water balance help my pool deck area photograph better for entertaining?\u003c\/h3\u003e\n\u003cp\u003eYes, clear, properly balanced water with a clean, unstained plaster surface and bright tile reads as more inviting and well-maintained in any setting, which enhances the visual impact of your outdoor entertaining area.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this product compatible with all plaster pool finishes and tile types?\u003c\/h3\u003e\n\u003cp\u003eYes, the calcium chloride increaser is formulated for use with standard plaster, pebble, and tile pool finishes, making it a versatile choice for protecting the visual integrity of your pool design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill this protect the dark plaster or aggregate finish I chose for my pool?\u003c\/h3\u003e\n\u003cp\u003eYes, all plaster and aggregate finishes are vulnerable to etching and staining from low hardness water. Raising hardness preserves the original color depth and texture of darker or specialty finishes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does this compare to resurfacing my pool to fix etching damage?\u003c\/h3\u003e\n\u003cp\u003eResurfacing costs thousands of dollars and requires draining the pool, whereas regular calcium hardness treatment is a low-cost preventive measure that avoids etching damage in the first place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does this compare to a pool cover for protecting my pool surface appearance?\u003c\/h3\u003e\n\u003cp\u003eA cover protects against debris and sunlight but does nothing for water chemistry. Calcium hardness treatment addresses the chemical cause of etching and staining, which a cover cannot prevent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eI'm worried the granular product will leave visible deposits on my pool floor. Is that a real risk?\u003c\/h3\u003e\n\u003cp\u003eIf broadcast across the surface and circulated properly, the granules dissolve fully. Any small undissolved particles are easily brushed away, and the Clorox Pool App guides you on proper application technique.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat if my plaster is already showing some etching, will this fix the existing damage?\u003c\/h3\u003e\n\u003cp\u003eNo, this product prevents further damage but does not reverse existing etching. It is a protective and preventive measure, so starting treatment early preserves surfaces that are still in good condition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs the 3-pack really necessary if I only have one pool?\u003c\/h3\u003e\n\u003cp\u003eFor most backyard pools in soft water regions, the 3-pack provides a full season of hardness maintenance at a lower cost per treatment, making it the smarter value even for a single pool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill using this product help my pool look better for real estate listing photos if I sell my home?\u003c\/h3\u003e\n\u003cp\u003eYes, a well-maintained pool with clean, unstained plaster and tile, plus corrosion-free metal fixtures, significantly enhances curb appeal and buyer perception during showings and photography.\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":43647652626522,"sku":"FNHB0FVNS9RSK","price":43.3,"currency_code":"USD","in_stock":false},{"title":"1 Count (Pack of 1)","offer_id":43647652659290,"sku":"F7CB084GQH8YF","price":12.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/7969\/9034\/files\/4-pound-granular-calcium-chloride-increaser-formula-1.jpg?v=1783889867","url":"https:\/\/knacklos.myshopify.com\/products\/clorox%c2%ae-pool-spa%e2%84%a2-calcium-hardness-increaser-for-aesthetic-plaster-pool-preservation-keeps-tile-and-surface-looking-new-4lb","provider":"Knacklos","version":"1.0","type":"link"}