HASA Muriatic Acid 4 Gallon Case
Product Overview
The standard specification for professional pH and alkalinity control in residential and commercial pools.
HASA Muriatic Acid (31.45% concentration) is what pool techs reach for when they need to reliably lower pH and total alkalinity. This heavy-duty 4 Gallon case provides commercial-strength liquid acid that disperses rapidly to keep your pool water balanced within the ideal pH range of 7.2–7.6. Unlike dry acid alternatives, this liquid formula leaves no binders or residues behind, making it a proven choice for maintaining pristine plaster and tile surfaces.
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Benefits & What Makes It Different
Commercial-Strength 31.45% Concentration
This professional-grade muriatic acid delivers rapid pH and alkalinity reduction without the added sulfates found in dry acid alternatives.
Convenient 4 Gallon Case Packaging
Packaged in a heavy-duty 4 Gallon case of four individual one-gallon bottles, allowing for safer handling, easier pouring, and stable storage.
Effective Scale and Stain Removal
In addition to water balancing, it serves as a highly effective wash for removing calcium scale deposits from pool tile, plaster, and concrete surfaces.
Product Details
Hydrochloric Acid (Muriatic Acid) 31.45%
1.25 pints per 10,000 gallons to lower total alkalinity by 10ppm.
Compatibility
- Never mix directly with chlorine or any other pool chemicals, as this releases extremely toxic chlorine gas.
- Compatible with all pool surface types, but must be diluted before application on plaster to prevent etching.
- Safe for saltwater chlorine generator systems when added with the pump running.
When To Use This
Pro Tip
When lowering alkalinity, turn off the pool pump and pour the muriatic acid slowly in a single spot in the deep end. For lowering pH, keep the pump running and distribute the diluted acid around the perimeter. In hard water regions like the Southwest, high evaporation rates naturally drive pH and calcium up, requiring more frequent acid additions to maintain the ideal 7.2–7.6 pH range.
Common Questions & Instructions
How much HASA muriatic acid do I need to lower my pool's total alkalinity?
To lower total alkalinity by 10ppm, the standard dosage is 1.25 pints of HASA muriatic acid per 10,000 gallons of pool water. Always measure your starting alkalinity first to ensure it lands within the ideal 80–120 ppm range.
Can I use HASA muriatic acid to clean concrete or remove scale?
Yes, this 31.45% muriatic acid is highly effective for etching concrete and removing stubborn calcium scale. For surface cleaning, always dilute the acid by pouring it cautiously into a bucket of tap water at a minimum 10:1 water-to-acid ratio.
How long should I wait to swim after adding muriatic acid to my pool?
We recommend waiting at least 30 to 60 minutes with your pool's circulation system running before swimming. This ensures the acid is thoroughly dispersed and prevents localized pockets of low pH 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.
