MAV AquaDoc pH Down for Pools — Sodium Bisulfate Decreaser, 10 lb Fast‑Dissolving & Chlorine/Saltwater Safe

MAV AquaDoc pH Down is a sodium bisulfate dry acid formulated to lower high pool pH and alkalinity quickly and safely for clearer, more balanced water.

Keeping pool water balanced means better clarity, longer-lasting equipment, and a more comfortable swim. MAV AquaDoc pH Down (10 lb) is a professional-grade, fast-dissolving dry acid designed for residential and commercial pools. It targets elevated pH and total alkalinity to help prevent scale, cloudy water, and circulation issues while being compatible with chlorine, bromine, and saltwater systems. This product is made in the USA to consistent quality standards and is intended for routine pool maintenance during openings, closings, or season-long adjustments.

How does MAV AquaDoc pH Down lower pool pH and alkalinity?

MAV AquaDoc uses sodium bisulfate, a dry acidic salt, that reacts with pool water to reduce pH and, with repeated additions, lower total alkalinity. It dissolves quickly when added to the deep end so it can begin neutralizing alkaline components and bring water back into target ranges.

• Active ingredient: sodium bisulfate (dry acid) for predictable pH reduction.
• Fast-dissolving granules—add to deep end, no premixing required.
• Works with standard test kits to fine-tune dosing and reach target pH.

How do I use this 10 lb bag safely and effectively?

Wear protective gloves and eyewear when handling concentrated chemicals. Broadcast granules into the deepest section of the pool while the pump runs, avoid adding near skimmers, and wait recommended time before retesting.

• Test pH and alkalinity before adding product to determine dose.
• Add to deep end while pump circulates; allow 15–30 minutes before retesting.
• Adjust incrementally—small doses followed by retesting prevent overcorrection.

Will it work with my chlorine or saltwater system?

Yes. MAV AquaDoc pH Down is compatible with chlorine, bromine, and saltwater pools. Lowering pH with this product supports sanitizer performance and clarity but should be part of a complete water care routine.

• Safe for use with common pool sanitizers when dosed correctly.
• Helps stabilizers and chlorine work more efficiently at proper pH.
• Regular monitoring avoids impacts on sanitizer levels after pH changes.

How does it protect pool surfaces and equipment?

High pH and alkalinity encourage calcium scaling, cloudy water, and reduced circulation efficiency. By bringing pH down into the recommended range, this sodium bisulfate product reduces the chance of scale buildup on surfaces, heaters, and plumbing components.

• Helps prevent calcium deposits and roughening on plaster and tile.
• Reduces likelihood of cloudy water caused by mineral imbalance.
• Supports longer equipment life through balanced water chemistry.

Who this is for: MAV AquaDoc pH Down 10 lb is intended for pool owners, maintenance professionals, and facility managers who need a reliable, made-in-USA dry acid to correct high pH and alkalinity. It’s suitable for backyard pools, commercial pools, and anyone who performs routine chemical balancing and prefers a fast-dissolving granular formula that integrates with common sanitizers. If you test and maintain water regularly and follow safety instructions, this product helps keep water clear and systems running efficiently.