15 g per m³ raises TA by approximately 10 ppm. Always pre-dissolve and retest.

Will it raise pH too?

Slightly, around 0.05 per 15 g per m³. Usually negligible.

Why is alkalinity important?

TA buffers pH. Without it, every dose moves pH and you spend the season chasing the test reading.

Is it the same as kitchen baking soda?

Yes. Pool-grade is the same compound at 99% purity, sold cheaper at sack scale.

How long does a pack last?

5 kg lasts a typical 40 m³ pool around 9-12 months.

What is the active ingredient?

Sodium bicarbonate (NaHCO3) at 99% purity.

How does it differ from soda ash?

Bicarbonate raises TA cleanly with minimal pH effect; soda ash raises both pH and TA together. Choose by which value needs lifting.

What TA range should I aim for?

80-120 ppm for plaster pools, 100-150 ppm for vinyl liner pools.

Test the dose accurately; freshly opened sack dissolves cleanly. Dump-doses cake on liner and waste product.

Pre-dissolve next time; cloud clears in 12 hours of filtration.

Bicarbonate vs soda ash?

Bicarbonate for TA only; soda ash for pH and TA together. Different jobs.

Bicarbonate vs sequestrant?

Bicarbonate buffers chemistry; sequestrant binds metals. Both can be dosed together if water is hard and metals are present.

Pool Alkalinity Increaser - Sodium Bicarbonate

Name: Pool Alkalinity Increaser - Sodium Bicarbonate
Brand: ClearSpa
SKU: pb-3
Availability: InStock
Rating: 5.0 (5 reviews)

Sodium bicarbonate alkalinity increaser for swimming pools. The clean, food-grade buffer that lifts total alkalinity 10 ppm per 15 g per m³ without disturbing pH.

Raises total alkalinity approximately 10 ppm per 15 g per m³.
Buffers pH so it stops bouncing between doses.
Stops eye sting and corrosion that come with TA below 60 ppm.
Lifts TA cleanly without adding calcium.
Pairs with pH Plus when both pH and TA are low.