SKU: 17972891675

SpaPure Calcium Hardness Increaser (16 oz)

Sale price$15.29 Regular price$16.99
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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For Your Every Summer RSVP, with Code: SUMMER15

Description

SpaPure Calcium Hardness Increaser (16 oz)The SpaPure Hardness Increaser is a granular product that is designed to safely raise the calcium hardness levels in your spa water. Regular use of this product will stop and prevent the corrosion of your spa's surfaces. This product is compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide. Safely raise the calcium hardness levels in your spa water Stop and prevent the corrosion of your spa's surfaces Compatible

The SpaPure Hardness Increaser is a granular product that is designed to safely raise the calcium hardness levels in your spa water.

Regular use of this product will stop and prevent the corrosion of your spa's surfaces.

This product is compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide.

Safely raise the calcium hardness levels in your spa water

Stop and prevent the corrosion of your spa's surfaces

Compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide

Directions NEVER mix different product together in the same bottle or pail.

Add this product directly to the spa water.

Turn on circulation system.

Add 1 ounce (2 tablespoons) for every 500 gallons of water to increase the calcium hardness 10 ppm.

Broadcast over the surface of the water.

Spa may be used immediately after the products application.

Wait two hours and retest calcium hardness.

Ingredients Calcium Chloride Dihydrate: 100%

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 17972891675

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4.5 ★★★★★
Based on 14 reviews
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Susan
Draper, US
★★★★★ 4
Stay put!
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
Nice and thin, soft, and stay put. I wear an 8 shoe and don’t like a thick sock taking up room. These socks are a bit tight on big toe. Wish they came in large.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 10, 2023
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Verified Purchase
Stephanie Robnett
Massapequa, US
★★★★★ 5
The best
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
The best no show socks I have found. Stay in place very well and hold up wash after wash. I have tossed all the other brands I’ve bought over the years and stocked up on these as I was tired of digging through the drawer hoping to find a clean pair.
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Reviewed in the United States on December 8, 2024
G
Verified Purchase
Ginni
Pawtucket, US
★★★★★ 5
Love these.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I have them in black and white. I use them everyday in all shoes. These are very versatile and a great quality material. They take a looong time to wear and they stay in place. Very washable and good material. They are not too thick and they do not shrink. I do air dry mine. They do not hold smells even in the summer heat.
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Reviewed in the United States on July 7, 2024
M
Verified Purchase
Maria White
Houston, US
★★★★★ 5
Perfect!
Number of Items: 3, Color: Pink Quartz Assorted (3-pairs), Size: Medium
My new favorite socks! True to size, fit perfectly, and the best part is they do not slide off your foot! 10/10 recommend!
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Reviewed in the United States on July 10, 2025
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Verified Purchase
September Hall
Cuba, US
★★★★★ 5
Great no show socks
Size: Small, Color: (725) Oxford Brown / Oxford Brown / Black
Very comfortable and perfect fit for my small feet. I love the full coverage sock feel with a totally no show sock.
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Reviewed in the United States on May 29, 2026

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