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🛁 Elevate your soak game—because your spa deserves the best balance!
HTH Spa 86131 Alkalinity Up is a 1.25 lb spa chemical designed to precisely raise and maintain total alkalinity between 80-120 ppm, stabilizing pH levels to ensure clear, comfortable water. Compatible with all major sanitizers, it protects spa surfaces and equipment from damage, prolonging their lifespan. Trusted by thousands with a 4.7-star rating, it’s the essential, easy-to-use solution for professional-grade spa water balance.
| ASIN | B09JZWWJTC |
| Best Sellers Rank | #38,269 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #86 in Swimming Pool Balancers |
| Brand Name | HTH |
| Customer Reviews | 4.7 4.7 out of 5 stars (734) |
| Date First Available | October 21, 2021 |
| Included Components | HTH Spa 86131 Alkalinity up, |
| Item Dimensions LxWxH | 2.53 x 2.53 x 7.86 inches |
| Item Package Dimensions L x W x H | 8.07 x 2.52 x 2.48 inches |
| Item Weight | 1.3 Pounds |
| Manufacturer | Innovative Water Care |
| Material | Plastic |
| Model Name | Spa Care Alkalinity Up |
| Model Year | 2022 |
| Number of Items | 1 |
| Package Weight | 0.62 Kilograms |
| Part Number | 86131 |
| Size | 1.25lb |
| Suggested Users | unisex-adult |
| Warranty Description | Warranty |
T**E
Exceptional Service
Exactly what we needed for our very hard well water to help balance our hot tub. Product was excepting its performance and I would highly recommend to anyone needing hot tub supplies. We love in a rural community and prompt and professional service is very important to us!
C**C
Keeping the alkalinity up, balancing out the other chemicals, and making my kid and dog happy
HTH is my go to brand for all my hot tub (inflatable hot tub supplies)! The products are doing what they're supposed to do to keep the hot tub clean and safe for my son which is all that matters. After using HTH Alkalinity Up in our inflatable hot tub, I can confidently say it’s a fantastic product for anyone looking to maintain optimal water quality with minimal hassle! It's not often we need it but it's a great product when needed. And a fantastic price HTH Alkalinity Up has become an essential part of our tub maintenance routine. It gives peace of mind knowing the water is always comfortable, clean, and ready—whether we’re enjoying a heated soak or cooling off after a hot day. For anyone with an inflatable hot tub looking for an efficient way to keep alkalinity in check, I highly recommend it.
S**A
Spa Alkalinity Tests
Works well, we use these to test our hot tub PH levels. They work just as described, and they last us about a month.
G**!
It works
Excellent product keeps my tub nice and clean every time
J**J
much cheaper than our local spa store!
This hot tub spa alkalinity increaser is a game-changer for maintaining water balance in my hot tub! I had been struggling with fluctuating pH levels and cloudy water, but this product made it so easy to get the alkalinity back to the optimal range. It dissolves quickly in the water and doesn’t leave any residue or cloudiness behind. I noticed a significant improvement in water clarity and feel almost immediately after using it. It also helps stabilize the pH, which means fewer adjustments are needed over time. The instructions are clear and simple to follow, and it’s easy to measure out the right amount for my hot tub’s size. I’ve used this product a few times now, and each time, it does exactly what it’s supposed to – it restores balance to the water and makes my hot tub experience even more relaxing. If you’re looking to keep your spa’s water perfect, I highly recommend this alkalinity increaser!
S**H
Satisfied
I like this brand. It does a great job with my bromine hot tub
N**M
Great to control alkalinity in my spa water
Just a little now and then keeps the alkalinity at the proper level
C**N
Good
Good
A**K
Best price and products works great
C**E
Good
D**N
Great product and reasonably priced
D**.
Good price
P**L
Best we have used so far
Trustpilot
2 months ago
2 months ago