Clorox® Pool&Spa™ Calcium Hardness Increaser for Aesthetic Plaster Pool Preservation, Keeps Tile and Surface Looking New 4LB
Clorox® Pool&Spa™ Calcium Hardness Increaser for Aesthetic Plaster Pool Preservation, Keeps Tile and Surface Looking New 4LB
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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
Will this calcium increaser prevent the white etching marks I see developing on my pool tile?
Yes, 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.
Can this product keep my pool surface looking new as part of my overall backyard aesthetic?
Yes, 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.
Does preventing metal corrosion help maintain the look of my pool ladder and fixtures?
Yes, 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.
Will the Clorox brand reputation matter for someone who values quality in every detail of my home?
Yes, 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.
Can proper water balance help my pool deck area photograph better for entertaining?
Yes, 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.
Is this product compatible with all plaster pool finishes and tile types?
Yes, 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.
Will this protect the dark plaster or aggregate finish I chose for my pool?
Yes, 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.
How does this compare to resurfacing my pool to fix etching damage?
Resurfacing 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.
How does this compare to a pool cover for protecting my pool surface appearance?
A 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.
I'm worried the granular product will leave visible deposits on my pool floor. Is that a real risk?
If 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.
What if my plaster is already showing some etching, will this fix the existing damage?
No, 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.
Is the 3-pack really necessary if I only have one pool?
For 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.
Will using this product help my pool look better for real estate listing photos if I sell my home?
Yes, 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.
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.
