Top 10 Best sodium bisulfate in 2026

Last Updated - 6/19/2026

🏆Best Choice

Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool pH Down, Lowers pH, Protects Against Eye and Skin Irritation, 5LB (Pack of 1)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Lowers High pH: Clorox Pool&Spa Swimming Pool pH Down is formulated to restore neutral pH in pool water. By decreasing pH levels, it helps restore water parameters to their ideal ranges, ensuring a balanced and healthy swimming environment.
•Protects From Scale - This product provides protection against scale buildup in your pool, offering a safer and easier alternative to using Muriatic acid. Ideal for all pool types, it features an easy-pour design and splash-free application.
•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

$10.99

-18%

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HTH

HTH Spa 86132 pH Down, Spa & Hot Tub Chemical Lowers pH, Prevents Scale, 2.5 lbs

9.6

ChoiceComparer.com Score

9.6

/ 10

Outstanding

Main highlights

•BENEFIT: Decrease and balance the pH levels in your spa water or hot tub for beautiful clarity, improved sanitizer efficiency and a more relaxing experience
•IMPROVES PERFORMANCE: Allows sanitizer to work more effectively; Prevents scaling of spa surfaces and equipment
•CONTAINS MINERAL CRYSTALS: HTH Spa pH Down is formulated to provide a more relaxing spa experience
•COMPATIBLE WITH ALL SPAS: HTH Spa pH Down is great for all spas, including bromine, chlorine and biguanide
•YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Test Strips twice a week to test, balance and maintain total pH levels between 7.2 and 7.8 ppm

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$7.89

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In The Swim

In The Swim pH Reducer for Swimming Pools, Spas, and Hot Tubs - Lowers Alkalinity - Prevents Cloudy Water - Balances Water - 90% Sodium Bisulfate - 30 Pounds

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•pH Reducer lowers Total Alkalinity and pH for a safer swimming experience in pools, spas, and hot tubs.
•Enhances chlorine effectiveness, prevents damage to pool equipment and swim gear by lowering alkalinity and pH.
•Healthy pH ensures enjoyable pool water all summer.
•Corrects pool pH to prevent skin irritation and equipment damage.
•Ideal pH for swimming pools falling in the range of 7.2 to 7.6.

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$74.99

$79.99

-6%

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HTH

HTH Pool Care pH Down, Lowers pH, Swimming Pool Chemical, 5 Lbs

9.3

ChoiceComparer.com Score

9.3

/ 10

Excellent

Main highlights

•BENEFITS: Lower and balance the pH levels in your swimming pool water for beautiful clarity, improved chlorine efficiency and overall healthy swimming; Helps chlorine to work efficiently
•PREVENTS STAIN & SCALE: Balanced pH levels help chlorine to work efficiently and prevent scale formation on pool surfaces and equipment
•IMPROVES SWIMMER COMFORT: Balanced pH levels help prevent eye and skin irritation; Also prevents surface damage
•SWIM IMMEDIATELY: After pH Down application, swimmers can jump right back in the water; Compatible with all swimming pools
•YOU'RE ALL CLEAR WITH HTH: For best results, use HTH 6-Way Test Strips weekly to test, balance and maintain pH levels between 7.2 and 7.8 ppm

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$15.16

$17.00

-11%

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Doheny's

Doheny's pH Minus | pH Down for Pools | Sodium Bisulfate Dry Acid | Fast Acting pH Reducer | Pool Water Balancer | Pro Strength | Works in All Pool Types | Proudly Made in USA | 30 lb

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Proudly Made in America – Essential Pool Care: Trusted for over 50 years, Doheny’s family-owned brand helps maintaining perfect pH levels to create a well-balanced, comfortable swimming environment.
•Multi-Purpose pH Minus: Lowers pH to enhance the effectiveness of all your pool chemicals.
•Benefits of Properly Balanced pH: Lowers high pH while minimizing equipment corrosion, eye irritation, and skin dryness.
•Premium-Grade Formula: Made with high-quality sodium bisulfate (dry acid) for reliable results.
•Convenient Packaging: Available in 5- and 10-lb pouches or a 30-lb bulk bucket.

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$67.49

$74.99

-10%

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Robelle

Robelle 6-Pounds Premium pH Down for Pools, Concentrated Sodium Bisulfate, Made in USA

9.0

ChoiceComparer.com Score

9.0

/ 10

Great

Main highlights

•Sodium Bisulfate for pools
•Rapidly Decreases pH
•Proper water balance helps reduce skin and eye irritation
•Adjust and maintain pH at 7.2-7.6

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$24.51

$29.99

-18%

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MAV AquaDoc

MAV AquaDoc pH Down for Pools - 5lb - Sodium Bisulfate pH Decreaser for Pool & Alkalinity Decreaser - Easy Dissolving Dry Acid Pool Chemicals Made in The USA

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Lowers High pH & Alkalinity – AquaDoc pH Reducer for pool reduces high pH and alkalinity to maintain balanced swimming pool water. This Sodium bisulfate formula prevents cloudy water, scaling, and damage to pool equipment.
•Fast-Dissolving Dry Acid – Our pro-grade dry acid for pool works quickly to adjust pH levels. Simply add directly to the deep end of the pool and let it dissolve—no pre-mixing required. Swim-ready in just 15 minutes!
•Prevents Scaling & Cloudy Water – High pH can cause calcium buildup, leading to rough surfaces and cloudy pool water. AquaDoc’s sodium bisulfate for pool effectively prevents scaling, protecting pool surfaces, plumbing, and equipment.
•Safe for All Pool Types – Works with chlorine, saltwater, and bromine pools. Our alkalinity decreaser for pool helps optimize sanitization, lower pH in pool and improve water clarity.
•Made in the USA: We’re the pool opening and closing experts. At AquaDoc, all of our pool chemicals are held to the highest standards and made exclusively in the USA. Trust the experts for all your pool maintenance needs.

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$22.99

$30.99

-26%

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SpaChoice

SpaChoice 2.5-Pounds Premium pH Decreaser for Hot Tub, 100% Sodium Bisulfate, Made in USA

8.7

ChoiceComparer.com Score

8.7

/ 10

Good

Main highlights

•This product should be used if pH is above 7.8
•Add 1 ounce of this product and retest every 30 minutes until pH and total alkalinity are in the range of 7.2-7.8 and 80-140 ppm respectively
•Adjusts water pH and alkalinity downwards

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$17.34

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Modernist Pantry

Sodium Bisulfite ⊘ Non-GMO Gluten-Free Vegan OU Kosher Certified - 400g/14oz

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•100% Food Grade (beware cheap industrial grade products not meant for human consumption)
•✡ Highest Quality Assured by Strict Orthodox Union Certification Standards
•Anti-oxidant used to prevent browning (caused by oxidation)
•Commonly used to preserve freshness in vegetables (particularly leafy green vegetables)
•Perfect for Molecular Gastronomy and Modernist Cooking applications

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$19.99

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