Sodium Bicarbonate
Sodium bicarbonate (baking soda) is the standard chemical for raising total alkalinity in pool water.
Definition
Sodium bicarbonate (baking soda) is the standard chemical for raising total alkalinity in pool water.
Typical Values: Raises TA by 6.7 ppm per pound per 10,000 gallons; minimal pH effect
In Plain Language
Sodium bicarbonate (NaHCO3) dissolves slowly in pool water and primarily raises total alkalinity with a modest effect on pH. It is the safest and most practical product for increasing TA. One pound raises TA by approximately 6.7 ppm per 10,000 gallons. Broadcast it around the pool perimeter with the pump running, allow 4–6 hours, and retest before adding more.
Why It Matters
Sodium bicarbonate is the first chemical adjustment in the correct water balance sequence, as it stabilises pH and makes subsequent adjustments more predictable.
Typical Values
Raises TA by 6.7 ppm per pound per 10,000 gallons; minimal pH effect
Last reviewed: 2026-06-01