PoolFix pH Reducer Sodium Bisulfate Granular 10 lb Bag — Lowers pH & Alkalinity, Resealable Dry Acid for Pools Spas Hot Tubs

PoolFix pH Reducer is a 10 lb bag of granular sodium bisulfate that safely lowers high pH and total alkalinity in pools, spas, and hot tubs to help restore balanced, clear water.

Keeping pool water balanced prevents cloudy water, scale deposits, and swimmer discomfort. PoolFix pH Reducer uses a dry acid formula (sodium bisulfate) designed for precise dosing and easier storage than liquid acids. The 10-pound resealable bag contains 93% active ingredient, manufactured in the United States for consistent performance across residential and commercial systems.

How quickly will this product lower my pool’s pH?

Response time depends on water volume and circulation. After dissolving and broadcasting the recommended dose, circulation should distribute the acid and pH changes are typically measurable within one to four hours.

• Dissolve granules in a bucket of water before adding for safe application.
• Run the pump and filter during and after treatment for uniform mixing.
• Test pH after one hour, then again at four hours and adjust if needed.
• Each dose reduces pH and total alkalinity proportionally—follow label dosing for accuracy.

Is this safer to handle than muriatic or hydrochloric acid?

Yes. The dry sodium bisulfate formulation eliminates strong acidic fumes and splash risks common with liquid acids. It’s simpler to measure and store, but still requires standard safety precautions.

• No corrosive fumes—better for enclosed pump rooms and storage areas.
• Resealable pouch reduces accidental spills and moisture exposure.
• Wear gloves and eye protection when measuring and dissolving.
• Always pre-dissolve granules in water; never add water to dry chemical.

Can I use PoolFix pH Reducer in my spa or hot tub?

Yes. The product is formulated for use in pools, spas, and hot tubs and works with all standard filtration systems. Because hot water accelerates chemical reactions, test and adjust more frequently in spas and hot tubs.

• Use smaller, carefully measured doses for compact spa volumes.
• Allow circulation to run for at least 30–60 minutes after addition.
• Retest pH and alkalinity before allowing bathers to enter.
• Compatible with chlorine and bromine sanitizer systems when used as directed.

How much should I add to correct high pH and alkalinity?

Dosing varies by pool volume and current pH/alkalinity readings. Follow label tables or a pool calculator for precise amounts; start with a conservative dose and retest before adding more.

• Calculate your pool or spa volume in gallons for accurate dosing.
• Adjust in increments—it's easier to add more than to reverse overcorrection.
• High total alkalinity often requires staged treatments to bring both pH and alkalinity into range.
• Consult product instructions or a pool professional for large corrections.

Who this is for: PoolFix pH Reducer is intended for pool and spa owners, maintenance professionals, and seasonal clean-up crews who need a stabilized, easy-to-handle dry acid to lower pH and total alkalinity. Choose this product if you prefer a granular, resealable format that minimizes fumes and splash risks while providing a 93% active sodium bisulfate formulation made in the USA. Ideal for inground and above-ground pools, hot tubs, and situations where predictable, controlled pH adjustments are required.