In The Swim Calcium Hardness Increaser 25 lbs Y7210
In The Swim Calcium Hardness Increaser 25 lbs Y7210
Hero image 0 of In The Swim Calcium Hardness Increaser 25 lbs Y7210, 0 of 7

In The Swim Calcium Hardness Increaser 25 lbs Y7210

Key item features

  • Average 97% Calcium Chloride
  • Increases calcium hardness level
  • Dosage 6 lbs per 10,000 gallons to raise calcium hardness level about 50 ppm
  • Prevents aggressive or corrosive water
  • DO NOT PRE MIX
Current price is $59.99
Price when purchased online
  • Free shipping

How do you want your item?

How do you want your item?
Ships to
Arrives by Thu, Jun 25
|
Sold and shipped by In The SwimPro Seller
4.377896055103319 stars out of 5, based on 3194 seller reviews(4.4)
Return policy

About this item

Product details

Specifications

Warranty

Warnings

Customer ratings & reviews

4.7 out of 5 stars
stars81 ratings58 reviews
How item rating is calculated

Customer photos

Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 58 reviews

May 17, 2026
Stephen
Item details
Size: 45 lbs
Sold and shipped byIn The Swim
5 out of 5 stars review

Verified Purchase

Good product, good value

Arrived early. Chemical pellets were well protected, in a bag inside of the bucket. Added it to the pool per instructions and it did what it was supposed to. Greta value for the money vs other options.

Incentivized Review
Helpful?5S353RU8I0UB555006083
May 13, 2026
Thomas C.
5 out of 5 stars review

Seller Verified Purchase

product is what was expected good value at the sale price and I go it soon enough to broadcast chemical a few pounds per day so that it dissolves without any issues

Review from https://intheswim.com
Helpful?5S353RU8I0UB555006083
Sep 16, 2025
rebecca
Walmart Associate
Item details
Size: 45 lbs
Sold and shipped byIn The Swim
5 out of 5 stars review

Verified Purchase

Great product

I glad that Walmart had this available to order it came in 2 days!! Perfect for my inground pool needs.

Incentivized Review
Helpful?5S353RU8I0UB555006083