Best in 7 days
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- USA
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Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Spa Guard Spa Calcium Hardness Increaser 12ozSpaGuard Calcium Hardness Increaser 12 oz Low levels of calcium assist in spa surface and equipment deterioration, SpaGuard Calcium Hardness Increaser raises calcium levels to the recommended range of calcium in the water 200 1,000 ppm. SpaGuard's Calcium Hardness Increaser enables spa owners to increase their calcium hardness with this easy to use granular formula, which will boost your calcium hardness to above the danger zone, where low levels
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.8 ★★★★★
Based on 592 reviews
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Product Reviews
★★★★★ 5
Dealer wanted $200, Changed them in 5 min
Color: gray
Good quality, saved a lot of money over having a dealer or mechanic change them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
★★★★★ 5
As good as the original
Color: gray
Perfect fit engine air filter and cabin air filter.
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Reviewed in the United States on January 9, 2026
★★★★★ 4
Nice price for a good product
Color: gray
They’re a great fit at a good price I’ve used them before and I put them in before I have my oil change done because otherwise they try to charge you like lots of money for both of those when it takes five minutes max to get them both in your car
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Reviewed in the United States on April 1, 2026
★★★★★ 5
25’ Impreza
Color: gray
Good fit on both filters. Easy install 25’ Impreza RS
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Reviewed in the United States on April 27, 2026
★★★★★ 5
IMPRESSED!
Item Package Quantity: 1, Item Package Quantity: 1
I bought this for my Honda civic 2017 lx 1.5 and it is a perfect fit. I didn’t realize how important it is to change it. Let me tell you if you are thinking about buying this, it’s your sign not JUST because of health which is vital and first and foremost but the PRICE! At any oil change or auto shop they will charge no less than 50$ and I’ve seen higher. I will continue to buy this brand. I will update in my next 5,000 miles. 8.00$ or 50$+ and the quality is EXACTLY the same, your choice.
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Reviewed in the United States on April 3, 2026
