{"product_id":"clorox®-pool-spa™-swimming-pool-calcium-hardness-increaser-for-outdoor-pool-equipment-pad-prevents-corrosion-on-heaters-and-ladders","title":"Clorox® Pool\u0026Spa™ Swimming Pool Calcium Hardness Increaser for Outdoor Pool Equipment Pad, Prevents Corrosion on Heaters and Ladders","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\u003eDoes this calcium hardness increaser hold up in outdoor pool equipment pad storage through heat and rain?\u003c\/h3\u003e\n\u003cp\u003eYes, the 4-pound granular calcium chloride formula is sealed in a weather-resistant container and stores reliably on a covered pool equipment pad, in a pool storage shed, or beside the outdoor pool deck as long as it is kept dry and the lid is tightly closed between treatments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I broadcast this granular increaser directly into an open-air backyard pool without pre-mixing?\u003c\/h3\u003e\n\u003cp\u003eYes, the granular format is designed to broadcast directly across the pool surface from the pool deck, making outdoor plaster pool maintenance fast and simple without the need to pre-dissolve in a bucket.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill the bulk 3-pack option reduce how often I have to restock during the outdoor swim season?\u003c\/h3\u003e\n\u003cp\u003eYes, the 3-pack option lowers your cost per treatment and minimizes reordering frequency, which is especially helpful for DIY homeowners in soft water regions who treat the backyard pool multiple times across a long outdoor swim season.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this product a good portable solution for pool service technicians working across multiple outdoor commercial properties?\u003c\/h3\u003e\n\u003cp\u003eYes, the granular 4-pound format is easy to transport in a service vehicle and can be broadcast directly at commercial pool facilities, multi-unit residential pools, and hotel or community pools without pre-mixing equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eDoes the Clorox Pool App work for outdoor pool maintenance scheduling?\u003c\/h3\u003e\n\u003cp\u003eYes, the companion Clorox Pool App provides personalized dosage, testing, and problem-solving guidance so you can confidently treat your outdoor plaster pool from anywhere, including right at the pool deck.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill the granular formula dissolve properly in an outdoor pool with cool spring opening water?\u003c\/h3\u003e\n\u003cp\u003eYes, calcium chloride dissolves readily in pool water across typical opening temperatures. Following the Clorox Pool App dosage for your pool size ensures complete dissolution and balanced hardness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this calcium increaser better suited to outdoor soft-water regions than generic hardware store alternatives?\u003c\/h3\u003e\n\u003cp\u003eYes, it is specifically formulated to be effective in soft water regions where calcium deficiency is chronic, giving you more reliable hardness correction than generic alternatives in areas with consistently low mineral content.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eHow does this calcium hardness increaser compare to adding calcium through plaster-based pool surface leaching?\u003c\/h3\u003e\n\u003cp\u003eIt delivers a precise, measurable calcium dose rather than relying on unpredictable surface leaching, which can damage plaster over time. The granular increaser protects the surface instead of slowly dissolving it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs this a better outdoor storage choice than liquid calcium chloride additives?\u003c\/h3\u003e\n\u003cp\u003eYes, the granular format is far more stable in outdoor sheds and equipment pad storage, does not require special temperature handling, and is easier to measure accurately for pool deck broadcasting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill transporting this product in my service truck during outdoor jobs cause clumping or degradation?\u003c\/h3\u003e\n\u003cp\u003eNo, the granular calcium chloride is stable under normal service vehicle conditions as long as the container is sealed. Clumping risk is minimal compared to liquid calcium products that can crystallize in variable temperatures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eI'm worried this will raise hardness too high in my outdoor pool after a heavy rain. Is that a real concern?\u003c\/h3\u003e\n\u003cp\u003eIt can, which is why the Clorox Pool App provides personalized dosage based on your current test readings. Testing before each treatment prevents overcorrection even after rainfall dilutes your water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWill the metal fittings on my outdoor pool ladder really corrode without this product in soft water?\u003c\/h3\u003e\n\u003cp\u003eYes, low calcium hardness causes soft water to actively pull minerals from metal surfaces, leading to corrosion of ladders, heaters, and fittings. Raising hardness to the recommended range stops this corrosive action.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs one 4-pound bag enough for a typical outdoor backyard pool opening?\u003c\/h3\u003e\n\u003cp\u003eFor most residential in-ground plaster pools, one 4-pound bag raises hardness meaningfully when added at opening, though pools in very soft water regions may require the 3-pack for a complete seasonal correction.\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":43527208009818,"sku":"MMjB0FVNS9RSK","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=1782010307","url":"https:\/\/knacklos.myshopify.com\/products\/clorox%c2%ae-pool-spa%e2%84%a2-swimming-pool-calcium-hardness-increaser-for-outdoor-pool-equipment-pad-prevents-corrosion-on-heaters-and-ladders","provider":"Knacklos","version":"1.0","type":"link"}