Support answer · Alkalinity

What is pool alkalinity increaser, and when should I use it?

From Maytronics support, updated 2026-08-11, rewritten for clarity.

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The answer

What to know.

Pool alkalinity increaser is a chemical designed to raise low alkalinity levels. Most products use sodium bicarbonate (baking soda) as the active ingredient.

You may need it:

  • After heavy rain
  • After draining or refilling water
  • After adding acid to lower pH
  • During routine water balancing

Note: Alkalinity increaser can gradually increase pH. Sodium bicarbonate mainly raises alkalinity while causing only a small increase in pH.

Source: Maytronics support. Rewritten for clarity with the same steps; the videos and illustrations are Maytronics' own.

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