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SpaGuard

SpaGuard Spa Calcium Hardness Increaser - 12 Ounce

    • Based on 2,565 reviews
Condition: New
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$9.49 Why this price?

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Apr 28
Order within 9 hours and 7 minutes
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Features

  • Prevents corrosion of equipment due to low calcium hardness
  • Prevents etching of plaster due to low calcium hardness
  • Calcium Hardness Increaser

Description

Raises calcium levels

Brand: SpaGuard


Item Weight: 12 Ounces


Item Form: Powder


Product Benefits: Prevents Corrosion


UPC:


Brand: SpaGuard


Item Weight: 12 Ounces


Item Form: Powder


Product Benefits: Prevents Corrosion


UPC: 017541612326 017541646123


Unit Count: 12 Ounce


Package Dimensions: 7.76 x 2.4 x 2.36 inches


Item Weight: 12 ounces


Manufacturer: SpaGuard


Item model number: BIO42257


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 28

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Good price
Size: Pack of 1
This is a difficult to find the item which I cannot buy in any retail store in town. It works well and as a good price.
Reviewed in the United States on November 17, 2024 by Amazon Customer
    • Do not use if you use SpaSentry
Size: Pack of 1
The SpaGuard series of products are good and easy to use. The Calcium Hardness increaser is no exception. Turn spa on, dump it in, and it raises the hardness in your water. Easy peasy. In my experience, the problem comes if you've decided to use the SpaSentry product to help keep your pH steady for longer. An effect of using it is that it removes calcium from your water. So it actually reduces the hardness in your water. Well, if you follow the directions on the Calcium Hardness increaser, when the hardness reading is below 150ppm, you add the increaser. Which the Spa Sentry product, already in your water, precipitates out (as those white clumps you see in water). This fills your filter which then must be cleaned. And it drops the hardness again. Endless cycle... This product does what it's supposed to well. Its the SpaSentry that causes the problem. Your mileage may vary, but I'm staying away from the SpaSentry product next refill and manage pH the old-fashioned way of using pH increaser/decreaser as needed. ... show more
Reviewed in the United States on October 27, 2023 by Matt Wright
    • Product
Size: Pack of 1
As described, good price, nice product & great price!
Reviewed in the United States on November 16, 2024 by Peggy A.
    • Works Good
Size: Pack of 1
Review Image by Elise DeChaine Ghiglieri Elise DeChaine Ghiglieri
This product does the trick for hot tub. Does need to be dissolved prior to using in tub, and I feel I need to use more product than the ones I have used already in liquid form. Price point is decent, as the liquid form product tends to cost more, but maybe a slight tradeoff for how much quicker I've gone through the granules. Why 4 of 5 stars ... show more
Reviewed in the United States on July 5, 2024 by Elise DeChaine Ghiglieri Elise DeChaine Ghiglieri
    • Hot tub water quality improvement made easy with delivery
Size: Pack of 1
SpaGuard Spa Calcium Hardness Increaser is a game changer for spa care. It effectively raises calcium levels, ensuring balanced water and preventing damage to equipment. The application is straightforward, and I've noticed a significant improvement in water quality since using it. I love that Amazon has this and can get it delivered right to my door. ... show more
Reviewed in the United States on October 27, 2024 by Jaclyn
    • Good deal
Size: Pack of 1
Thank you for good quality product!
Reviewed in the United States on October 2, 2024 by ginger boyd
    • Its a spa chemical... it works...
Size: Pack of 1
We have good well water, so absolutely no hardness, evidently. It is taking a bit to get our CH increased for our hot tub but this chemical is doing the job. Not much else to say!
Reviewed in the United States on September 28, 2024 by gracielagata
    • USE SMALL AMOUNTS AT A TIME!!!!
Size: Pack of 1
It works perfect, and I will stick with it every time I fill my hot tub thanks to my water softener. On my pH test strips (three separate tests, several HOURS apart) all read 0ppm hardness. The chart on the bottle reads that to raise a 500 gallon hot tub 100ppm (mine is 500 gal), it will need 20 Tbsp of the granules (1.25 cups). Well there were about 2 cups in the bottle, and since I needed to fill about 2 inches worth as well (and because recommended is 100ppm-250ppm), I used the entire bottle. Bad idea, but my fault at the end of the day and I feel stupid. Don't do what I did and assume. Be patient, take your time, and use small amounts at a time and retest the water. It dissolves so quick, it'll show on a test every 15 minutes or so. ... show more
Reviewed in the United States on December 10, 2022 by Jake

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