REGAL CHEMICALS pH Minus
Product Overview
A granular alternative to muriatic acid that provides precise control over pH and total alkalinity.
Regal Chemicals pH Minus (SKU SBSL3199 480) is a dry acid formulation containing 93.2% sodium bisulfate. This 2.5 LBS. container offers a safer, more stable handling experience than liquid acids while effectively lowering pH to improve sanitizer efficiency. In our experience, this granular balancer is the standard specification for homeowners who want to avoid the fumes and splash hazards associated with liquid muriatic acid.
Benefits & What Makes It Different
93.2% Sodium Bisulfate
This high-concentration dry acid reliably handles pH reduction without the dangerous fumes or corrosive storage requirements of liquid alternatives.
Total Alkalinity Management
Specifically formulated to bring alkalinity down to the ideal 120 ppm to 140 ppm range for vinyl liners or 100 ppm for fiberglass, preventing scale formation.
Enhanced Sanitizer Efficiency
By lowering pH levels above 7.6, this product ensures your chlorine works at peak performance, protecting your water from algae and bacteria.
Product Details
Sodium bisulfate 93.2%
Approximately 1 lb per 10,000 gallons to lower pH by 0.2; refer to label for precise adjustments.
Compatibility
- Do not mix with other chemicals, especially chlorine or bleach
- Always add product to water, never water to product
- Avoid adding near metal fittings or skimmers to prevent corrosion
When To Use This
Pro Tip
In areas with high evaporation like the Southwest, total alkalinity tends to creep up as minerals concentrate; regular use of sodium bisulfate prevents the white scale lines often seen on tile.
Common Questions & Instructions
How much Regal pH Minus do I need to lower my pool's pH?
For a standard 10,000-gallon pool, you typically add 1 lb of sodium bisulfate to lower pH by approximately 0.2, though you should always test water first and refer to the 2.5 LBS. container's specific dosage chart.
Can I use this to lower total alkalinity in a vinyl pool?
Yes, for vinyl pools, you want to maintain alkalinity between 120 ppm and 140 ppm; if levels are high, pre-dissolve the product and pour it into the deep end with the pump running.
How long should I wait to swim after adding pH Minus?
We recommend waiting at least 2 hours with the filter running to ensure the Sodium bisulfate is fully dispersed and the pH has stabilized before re-testing and entering the water.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
