Top 10 Best alkalinity up in 2026

Last Updated - 6/9/2026

🏆Best Choice

Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool Alkalinity Increaser, Keeps pH Balanced, 5LB (Pack of 1)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•For Raising Total Alkalinity: The Alkalinity Increaser helps maintain balanced pH levels in your pool water. Proper alkalinity levels reduce the need for frequent maintenance, and our product's granulated formula is easy to apply and dissolves quickly.
•Improves Swimmer Comfort: This product plays a crucial role in enhancing swimmer comfort by preventing eye and skin irritation caused by unbalanced pH. It helps prevent dry, itchy skin and red, burning eyes, ensuring a more pleasant swimming experience.
•Protects Pool Equipment from Corrosion: By keeping your pool's pH level balanced, this product helps prevent equipment corrosion, allowing you to spend less time maintaining and more time enjoying your swimming pool.
•Perfect for All Pools: Clorox Pool&Spa Swimming Pool Chlorine Stabilizer is perfect for new pools, freshly refilled pools and pools that use liquid chlorine.
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.

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$10.94

$12.99

-16%

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SpaGuard

SpaGuard Spa Total Alkalinity - 2 Lb

9.6

ChoiceComparer.com Score

9.6

/ 10

Outstanding

Main highlights

•1 tbs. per 100 gallons raises total alkalinity 25ppm
•Eliminates "pH bounce"
•Helps prevent equipment and spa surface corrosion and damage

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$13.99

$14.99

-7%

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In The Swim

In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 50 Pounds

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•In Swim Alkalinity Increaser maintains pH and chlorine levels.
•Prevents pH swings, maintaining stable water chemistry.
•High pH causes skin rashes; low pH stings eyes.
•Ensures refreshing pool water, even in hot summers.
•Maintain alkalinity at 90-120 ppm. Add 1.5 lbs per 10,000 gallons to increase by 10 ppm.

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$79.99

$85.39

-6%

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HTH

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

9.3

ChoiceComparer.com Score

9.3

/ 10

Excellent

Main highlights

•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
•YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Test Strips twice a week to test, balance and maintain total alkalinity levels between 80 and 120 ppm

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$6.70

$13.33

-50%

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SpaChoice

SpaChoice 2-Pounds Premium Alkalinity Up, Alkalinity Increaser for Hot Tub, 100% Sodium Bicarbonate, Made in USA

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•The desired range for total alkalinity is 80-140 ppm
•Add 1 ounce of this product and retest every 30 minutes until total alkalinity is in the range of 80-140 ppm
•Raises total alkalinity and prevents pH bounce

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$12.58

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Clorox Pool & Spa

Clorox Pool & Spa Swimming Pool Alkalinity Increaser, Keeps pH Balanced, 16LB (Pack of 1)

9.0

ChoiceComparer.com Score

9.0

/ 10

Great

Main highlights

•For Raising Total Alkalinity: The Alkalinity Increaser helps maintain balanced pH levels in your pool water. Proper alkalinity levels reduce the need for frequent maintenance, and our product's granulated formula is easy to apply and dissolves quickly.
•Improves Swimmer Comfort: This product plays a crucial role in enhancing swimmer comfort by preventing eye and skin irritation caused by unbalanced pH. It helps prevent dry, itchy skin and red, burning eyes, ensuring a more pleasant swimming experience.
•Protects Pool Equipment from Corrosion: By keeping your pool's pH level balanced, this product helps prevent equipment corrosion, allowing you to spend less time maintaining and more time enjoying your swimming pool.
•Perfect for All Pools: Clorox Pool&Spa Swimming Pool Chlorine Stabilizer is perfect for new pools, freshly refilled pools, saltwater pools, and pools that use liquid chlorine.
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.

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$29.98

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Pool Mate

Pool Mate 10-Pounds Premium Alkalinity Increaser for Swimming Pools, 100% Sodium Bicarbonate

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Sodium bicarbonate for pools
•Raises total alkalinity and helps keep pool water pH stable
•Maintain total alkalinity in the range of 60 to 120
•11 ounces raises alkalinity 10 ppm per 5,000 gallons of water
•Prevents equipment corrosion and plaster damage

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$21.78

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Doheny's

Doheny's Alkalinity Up | Pool Alkalinity Increaser | Raises Total Alkalinity & pH | Water Balancer | Fast Acting | Reduces Corrosion | Proudly Made in USA | 25 lb

8.7

ChoiceComparer.com Score

8.7

/ 10

Good

Main highlights

•Proudly Made in America – Swimming Pool Supplies: Trusted for over 50 years, Doheny’s family-owned brand offers the ideal addition to your pool chemicals—because the perfect pool starts with proper pH levels.
•Pool Alkalinity Increaser: Balanced alkalinity levels (80-120 ppm) allow you to better control your pH levels; always adjust your alkalinity levels before your pH levels
•Benefits of Balanced Alkalinity: Increase the alkalinity of your pool to reduce surface etching, eye irritation, and skin dryness
•Ingredients: Contains Sodium Bicarbonate or "Soda Ash"
•Packaging: 5- or 10-lb ready-to-use pouches or 25-pound bucket available

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$40.49

$42.49

-5%

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Leslie's

Leslie's Alkalinity Up - Swimming Pool Total Alkalinity Increaser - 100% Sodium Bicarbonate - 5 Pounds

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Alkalinity increaser
•100% sodium bicarbonate
•Doesn't raise pH levels
•Keeps pool free of damage
•Helps maintain a safe swimming environment

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$21.99

$26.99

-19%

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