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Your cart is empty. The HTH Alkalinity Up helps balance the total alkalinity in your pool water for healthy swimming. Test your water weekly to make sure pH is between 60 and 120 ppm. If alkalinity in your pool water measures below 60, add HTH alkalinity increaser directly to the surface to increase the alkalinity levels. HTH Alkalinity Up is great for all pool types including vinyl-lined pools and saltwater systems.
About the Brand:
HTH was developed with the consumer in mind, offering products that are both economical and powerful enough for the toughest jobs. Within HTH’s wide selection of products, we offer everything you need for your pool, from deposit control formulas to non-chlorine shock treatments, powerful surface cleaners, clarifiers, and more.
If you like using HTH, check out some of the other similar brands from our parent company, Sigura. With brands like Applied Biochemists, Leisure Time, GLB, Spa Selections, and PooLife, Sigura has a long heritage and more than a century of experience in developing innovative water treatment solutions for use in pools, lakes, ponds, hot tubs, and more.
At Sigura, we have an unparalleled passion, pride, and commitment to delivering superior water treatments that improve the environment and enhance the security, health, and safety of the global communities we serve. With our track record of innovation and simple, intuitive solutions that anticipate needs, Sigura customers feel more secure as they enjoy their pools, spas, ponds, and lakes.
JJ March
Reviewed in the United States on March 7, 2025
Great product, fine grain immediately dissolves in pool
Good batteries
Reviewed in the United States on June 28, 2024
Liked that they stuck
William H. Cummings
Reviewed in the United States on July 6, 2021
It was great for our need.
Sondra M. DeVries
Reviewed in the United States on May 17, 2021
Good
Jen
Reviewed in the United States on August 4, 2020
Works just as it says.
Stomperdell
Reviewed in the United States on July 30, 2020
This is just bicarbonate of soda - if you don't have an easier source for a larger quantity then this is a good way to obtain this important chemical to balance your pool water. Nice resealable bag and quick delivery with Prime
Christi Campbell
Reviewed in the United States on June 9, 2020
Worked perfectly
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