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Robelle

Robelle 8-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

  • Based on 585 reviews
Condition: New
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Availability: 13 left in stock
Fulfilled by Amazon
Arrives Oct 17 – Oct 27
Order within 5 hours and 20 minutes
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Size: 8-Pounds


Features

  • Calcium chloride for pools
  • Rapidly increases total hardness
  • Helps prevent corrosion or etching of pools
  • Ideal calcium hardness range 200 - 400 ppm
  • 8 ounces raises calcium hardness level 10 ppm per 5,000 gallons of water
  • Prevents the staining or etching of your pool's surface
  • Low calcium hardness level can cause water issues

Description

This is a dry granular product that increases the total hardness in pool water to the recommended range.Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools: 200-300 ppm, Tile and Exposed Aggregate Pools: 200-400 ppm, Marcite, Fiberglass or Painted Pools: 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the included chart. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period.

Brand: Robelle


Item Weight: 8 Pounds


Item Form: Granular


Product Benefits: Calcium Increaser


UPC:


Brand: Robelle


Item Weight: 8 Pounds


Item Form: Granular


Product Benefits: Calcium Increaser


UPC: 034261280802


Global Trade Identification Number: 02


Unit Count: 128.0 Ounce


Product Dimensions: 10 x 10 x 10 inches


Item Weight: 8 pounds


Manufacturer: Robelle


Country of Origin: USA


Item model number: 2808B


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 17 – Oct 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Good product
Size: 8-Pounds
My order contained 2- 4lb bags of Pool Mate Calcium Increaser. The bags were packaged and taped very well in a box that was then placed in a larger box that wasn't taped so well. The larger box was slightly damaged, and the tape was loose; however, the smaller box containing the product was packaged so well that it remained undamaged. The bags reseal for storage and even have a handle built in to the bag. This stuff works great. It got my Calcium up in the pool quick. Make sure you mix it in water and disperse it in the pool that way. And once you mix it in a container with some water, don't let it sit around. It makes some serious heat. Don't touch this stuff with wet hands. It gets very hot very fast. ... show more
Reviewed in the United States on July 10, 2025 by Shawn K
    • Works Great
Size: 8-Pounds
Works as promised and is a good value, especially when bought in 32lb increments.
Reviewed in the United States on June 7, 2025 by Budman
    • I’ll buy again.
Size: 8-Pounds
Great product…it dissolved great !
Reviewed in the United States on July 8, 2025 by linda
    • Good value for money.
Size: 8-Pounds
Works as described.
Reviewed in the United States on October 10, 2019 by Amazon Customer
    • Great calcium pool increaser
Size: 8-Pounds
Great way to increase your calcium fast. It also dissolves quick with no remaining debris left behind.
Reviewed in the United States on June 15, 2025 by Jason S
    • Easy to use
Size: 8-Pounds
This product was easy to use in our pool and worked perfectly to get the water balanced quickly.
Reviewed in the United States on June 11, 2025 by Amazon Customer
    • Great price
Size: 8-Pounds
Great price
Reviewed in the United States on June 9, 2025 by JoPete
    • Works well and gives results close to what is stated on back
Size: 8-Pounds
I found that this works well. I've been monitoring my pool for a while and had to add Calcium for the first time after a big bailout. It does require a 5 gal bucket to dissolve it into solution before adding, but it also dissolves quickly in there. After that, you just dump that water-calcium solution along the edge of the pool while going around it. I added 2 lbs initially to see how dramatic the Calcium increase would be and found that it went up close to what the bag said it would after adding and waiting two hours. It is worth the money and is pretty easy to use. ... show more
Reviewed in the United States on October 18, 2024 by Krystian

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