


HTH® Pool Care Alkalinity Up
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
HTH® Pool Care Alkalinity UpRaise the total alkalinity level to ensure healthy swimming pool water and happy swimmers. Raises total alkalinity levels in pool water Helps pH levels from fluctuating Protects against skin & eye irritation Protects equipment and pool surfaces Raises alkalinity levels Keeps total alkalinity and pH levels in range in swimming pool water. Prevents surface damage Helps prolong the life of pool surfaces and equipment (pumps, filters and heaters). Youre
Quick Dispatch:
Your HTH® Pool Care Alkalinity Up orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your HTH® Pool Care Alkalinity Up ships.
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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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4.4 ★★★★★
Based on 1007 reviews
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Product Reviews
★★★★★ 2
Won’t fit like oem
It doesn’t fit well and had to modify it to get it as close as possible
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 1, 2026
★★★★★ 5
Fit!
Perfect
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
★★★★★ 1
Stay away
Do not buy these, they will melt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2025
★★★★★ 5
Fit very well
Yes
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Reviewed in the United States on December 18, 2025
★★★★★ 4
Fit. With Modification.
I lost one of my housings on the freeway and had a hard time finding the style I had. Different than the standard, but not the Euro ones. Hard to find, at least for me. These were a bit closer to what mine looked like. I had to remove the rubber gasket around the housing to get it to fit (2003 330XI) but it worked like a charm.
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Reviewed in the United States on January 16, 2025
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