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HTH Spa 86131 Alkalinity up, Spa & Hot Tub Chemical Raises Alkalinity, Stabilizes pH Fluctuation, 1.25 lbs

4.5 (12) Write Review
Free shipping on orders over $29.99

$8.31

$ 3 .99 $3.99

In Stock
  • Low alkalinity levels in spa water can cause undue damage to surface and equipment. HTH Spa Alkalinity Up not only raises the total alkalinity in your pool water, but it also helps keep the pH levels from fluctuating. This helps prolong the life of spa surfaces and equipment, like filter systems, and ensures healthy, comfortable water by protecting against skin and eye irritation.
  • BENEFIT: Easily raise the total alkalinity levels in your spa water to ensure it remains clear, clean, and healthy
  • CREATES MORE COMFORTABLE WATER: Keeps the pH levels in range, which helps protect against skin and eye irritation
  • PROLONGS THE LIFE OF YOUR SPA: Helps prevent damage to spa surfaces and equipment (pumps, filters, and heaters)
  • COMPATIBLE WITH ALL SANITIZERS: HTH Spa Alkalinity Up works great with bromine, chlorine and biguanide systems


HTH Spa 86131 Alkalinity up,


Customer
2025-08-16 17:10:32
This product works well for my spa.
Reganold Gresham
2025-08-09 16:12:03
Balances spa alkalinity like it should. Will order again.
Steven M. Kristensen
2025-07-17 17:31:13
Works very Good!
Jackson
2025-06-25 14:42:13
ok works good
BOBBIE A WINNER
2025-06-18 10:59:59
I don't like that i have different chemicals from different brands but sometimes when you find a product that works well.... you stick with it. This dissolves well, works well. I couldn't ask for more.
A.M
2025-04-19 10:11:42
Great product. Repeat customer. Get's the job done
Alex Soper
2025-04-14 13:21:56
The only thing I have not been able to control very well in my hot tub is the alkalinity. This is a pretty inexpensive product, and definitely worked. Within 24 hours I was able to stabilize the alkalinity levels to an acceptable range. Easy to use, and proves to work. For the price, this was definitely worth the purchase. I would recommend.
Customer
2025-03-01 11:36:35
Seemed like it dissolved a whole lot quicker then the other I had. In over 8 years never seen the container empty after a week.
Nadine
2025-02-15 14:42:13
La livraison est arrivée comme convenu.J'ai déjà utilisé une marque, mais celle-ci.... elle fait vraiment la job
mario
2025-01-05 15:28:57
Spa
David Robertson
2024-12-28 13:33:15
On reading ingredients, I found it is just 100% sodium bicarbonate, so I could have just bought a big box of baking soda. I'll make sure to do that next time.
Matthew F.
2024-12-02 15:51:53
It works, but it is just straight baking soda... Expensive baking soda!