Top 10 Best alkalinity increaser for swimming pools in 2026

Last Updated - 6/7/2026

🏆Best Choice

Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool pH Up, Raises pH, Protects Against Eye and Skin Irritation, 4LB (Pack of 1)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Raises Low pH: Clorox Pool&Spa Swimming Pool pH Up is formulated to elevate the pH levels in swimming pool water. By increasing pH levels, it helps in restoring water parameters to their ideal ranges, ensuring a balanced and healthy swimming environment.
•Improves Swimmer Comfort: This product plays a crucial role for swimmer comfort, as it prevents eye and skin irritation caused by low pH. It aids in preventing dry, itchy skin and red burning eyes for 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.
•Preserves Pool & Equipment - Unbalanced water can cause a corrosive environment that damages your pool surfaces or equipment. This product reduces pool maintenance, extending the life of your pool's cleanliness.
•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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$8.97

$9.99

-10%

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Arm & Hammer

ARM & HAMMER Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Clear Balance Pool Maintenance Tablets use the power of pure ARM & HAMMER Baking Soda in one simple step to maintain your pool’s alkalinity and pH levels the easy way
•Formulated with trusted ARM & HAMMER Baking Soda to help chlorine work more effectively in your swimming pool; this Baking Soda product for pools also helps to protect pool surfaces from corrosion
•Contains pure ARM & HAMMER Baking Soda and comes in a convenient tablet form, so there’s no measuring or mess; simply add one tablet for every one chlorine tablet to optimize chlorine performance in your swimming pool
•Using this Baking Soda for Pool product results in crystal-clear pool water that feels better on your skin and eyes, and can help reduce the need for other corrective and often costly swimming pool chemicals
•This Baking Soda for Pool product contains 24 tablets in a handy container with resealable lid, so you can choose the size that works best for your swimming pool maintenance needs

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$32.54

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Clorox Pool & Spa

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

9.5

ChoiceComparer.com Score

9.5

/ 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

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

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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$16.00

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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 - 25 Pounds

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

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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$44.99

$49.99

-10%

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HTH

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

9.1

ChoiceComparer.com Score

9.1

/ 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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Clorox Pool & Spa

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

8.9

ChoiceComparer.com Score

8.9

/ 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

8.6

ChoiceComparer.com Score

8.6

/ 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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Pool Mate

Pool Mate 25-Pounds Premium Alkalinity Increaser for Swimming Pools, 100% Sodium Bicarbonate, Made in USA

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

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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$49.89

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