Clorox Pool&Spa Calcium Hardness Increaser
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
 Amazon Sold by SIRAH'S | $8.00 | Oct 28, 2023, may have changed | Buy Now |
B Buy & Sell Outlet | $9.00 | Aug 2, 2022, may have changed | Buy Now |
T The BuildClub | $14.50 | Jul 12, 2022, may have changed | Buy Now |
S Super | $18.99 | Aug 4, 2022, may have changed | Buy Now |
S SuperShop | $18.99 | Aug 16, 2022, may have changed | Buy Now |
Prices are collected from retailer listings; each row shows the date we last saw that price.
Price history summary
Lowest new price we recorded at major retailers (Amazon, Walmart, Best Buy, Target, The Home Depot and Lowes) in the last 90 days: $9.53 at Amazon on Aug 26, 2026.
Range over the last 12 months: $9.53 (Amazon, Aug 26, 2026) to $12.54 (Amazon, Oct 7, 2026). Based on 15 recorded prices since Nov 5, 2025 for offers sold by these retailers themselves (not marketplace sellers). Summary as of Oct 19, 2026.
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Pros
- •Protects the vinyl pool liner effectively.
- •Dissolves quickly for convenient use.
- •Enhances water transparency, making the pool look clearer.
- •Reduces algae blooms, helping to keep water cleaner.
- •Offers great value for a necessary product, matching premium brands in effectiveness.
- •Easy to apply with straightforward instructions.
- •Comes with two internal packages, providing long-term use.
- •Suitable for frequent reordering and repeated applications.
- •Transferred to a sturdy plastic container for better moisture protection and easier storage.
- •Performs as well as more expensive alternatives.
- •Larger volume per package compared to similar products, offering good value.
Cons
- •Requires using a larger amount of product to achieve desired results.
- •Slightly more product needed to get the job done effectively.
- •Some users may find it takes more than expected to see results.
- •No major negatives reported, but some might prefer a smaller or more concentrated pack.
Bottom Line
Based on common user feedback, the CLOROX Pool&Spa Calcium Hardness Increaser delivers reliable performance and good value, especially for maintaining water clarity and protecting pool liners. If you're looking for a quick-dissolving, cost-effective solution to raise calcium levels, this product is a solid choice. However, be prepared to use a slightly larger quantity to reach your desired hardness, making it ideal for users who don't mind a bit more product per application. For those seeking a more concentrated or smaller package, exploring related products might be worthwhile.
What Reviewers Are Saying
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Discussion
ShopSavvy compares prices across thousands of retailers so you always get the best deal. Prices are collected from retailer listings, and each one shows the date we last saw it. Our expert reviews and community discussion help you make informed buying decisions.