Work out how much baking soda raises alkalinity, or how much acid lowers it.
How it works
Raising uses 1.5 lb of sodium bicarbonate per 10 ppm per 10,000 gallons. Lowering scales the table rate where 12 fl oz of 35% muriatic acid lowers alkalinity by 5 ppm.
Before you order
- Adjust alkalinity first, then pH.
- Add in stages and retest, since test readings can swing after dosing.
- Wear gloves and eye protection whenever you handle acid.
Common questions
What alkalinity should I aim for?
Common guidance is about 80 to 120 ppm, so check your plaster, liner and test kit recommendations.
Why is pH changing too?
Acid lowers pH and alkalinity together, and baking soda raises alkalinity with a small pH effect.