Clorox® Pool&Spa™ Swimming Pool Calcium Hardness Increaser for Outdoor Pool Equipment Pad, Prevents Corrosion on Heaters and Ladders
Clorox® Pool&Spa™ Swimming Pool Calcium Hardness Increaser for Outdoor Pool Equipment Pad, Prevents Corrosion on Heaters and Ladders
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Why you'll love it
- Trusted Clorox brand credibility in water care provides confidence over generic alternatives
- Prevents expensive damage to pool surfaces, heaters, and metal fittings from corrosive low-hardness water
- Companion Clorox Pool App delivers personalized dosage and testing guidance for accurate treatment
- Granular formula is easy to measure and broadcast directly into the pool without pre-mixing
- Specifically formulated to be effective in soft water regions where calcium deficiency is a chronic issue
- Multi-pack (3-pack) option reduces cost per treatment and minimizes reordering frequency
Perfect for
- Raising low calcium hardness levels in pool water after refill or seasonal opening
- Preventing corrosion of metal pool equipment, heaters, and ladders caused by soft water
- Stopping etching and staining on plaster pool surfaces and tile
- Routine water balancing maintenance to extend pool surface and equipment lifespan
- Restoring water chemistry in plaster pools located in soft-water geographic areas
For Beautiful, Comfortable Water
Balanced 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.
Preserves Pool & Equipment
Protects pool equipment and surfaces from the effects of unbalanced water.
Protects Surfaces
Prevents corrosion, etching and staining.
Test Weekly
Your pool chemistry can change quickly. Test your pool water weekly to ensure your chlorine and pH remain within optimal swimming levels.
Brush & Clean
Brush, vacuum and skim water surface weekly to remove dirt and debris.
Balance Water
Ensure your water parameters are balanced to their ideal ranges for optimal swimmer comfort and surface and eqipment protection.
Product Information
Prevents Corrosion, Etching, and Staining: With Clorox Pool&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.
Increases 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.
Extends 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.
Compatibility: Our Clorox Pool&Spa Swimming Pool Calcium Hardness Increaser is ideal for plaster pools and areas with soft water.
Clorox 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.
Clorox Pool&Spa Swimming Pool Calcium Hardness Increaser, Prevents Corrosion, Etching and Staining, 4LB (Pack of 1);12204CLX.Global Trade Identification Number: 00810821023108
Number of Items: 1
Item Type Name: Calcium Hardness Increaser, 4 lb.
Included Components: Includes: 1 x Pool&Spa 12204CLX Calcium Hardness Increaser, 4 lb
Item Form: Granular
Product Benefits: Staining Prevents,Corrosion,Prevents Corrosion
Item Weight: 4 pounds
Frequently Asked Questions
Does this calcium hardness increaser hold up in outdoor pool equipment pad storage through heat and rain?
Yes, 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.
Can I broadcast this granular increaser directly into an open-air backyard pool without pre-mixing?
Yes, 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.
Will the bulk 3-pack option reduce how often I have to restock during the outdoor swim season?
Yes, 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.
Is this product a good portable solution for pool service technicians working across multiple outdoor commercial properties?
Yes, 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.
Does the Clorox Pool App work for outdoor pool maintenance scheduling?
Yes, 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.
Will the granular formula dissolve properly in an outdoor pool with cool spring opening water?
Yes, 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.
Is this calcium increaser better suited to outdoor soft-water regions than generic hardware store alternatives?
Yes, 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.
How does this calcium hardness increaser compare to adding calcium through plaster-based pool surface leaching?
It 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.
Is this a better outdoor storage choice than liquid calcium chloride additives?
Yes, 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.
Will transporting this product in my service truck during outdoor jobs cause clumping or degradation?
No, 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.
I'm worried this will raise hardness too high in my outdoor pool after a heavy rain. Is that a real concern?
It 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.
Will the metal fittings on my outdoor pool ladder really corrode without this product in soft water?
Yes, 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.
Is one 4-pound bag enough for a typical outdoor backyard pool opening?
For 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.
How do I add calcium hardness increaser to my pool step by step?
First, 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.
How often should I test and add calcium hardness to maintain balanced water?
Test 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.
Can I apply calcium increaser at the same time as other pool chemicals?
It 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.
Is this product compatible with salt water chlorine generators?
Yes, 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.
Does this work with all pool sizes from small spas to large commercial pools?
Yes, 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.
What exactly comes in the box when I order this product?
You 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.
Is calcium chloride safe to use around landscaping and grass near the pool?
When 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.
How long does it take to see results after adding calcium hardness increaser?
Most 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.
What is the difference between calcium hardness increaser and a general pool water balancer?
Calcium 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.
