Muriatic Acid To Lower Alkalinity Calculator

Muriatic Acid to Lower Alkalinity Calculator

Muriatic acid, also known as hydrochloric acid, is commonly used to lower alkalinity in various applications, such as swimming pools and water treatment. Our muriatic acid to lower alkalinity calculator helps you determine the exact amount of acid needed to achieve your desired alkalinity level.

  1. Enter the current alkalinity level in parts per million (ppm).
  2. Enter the volume of water in liters.
  3. Select the muriatic acid strength percentage.
  4. Click the ‘Calculate’ button.

The calculator uses the following formula to calculate the amount of muriatic acid needed:

Muriatic Acid Needed (liters) = (Alkalinity Desired – Alkalinity Current) * Volume * 0.001 / (Acid Strength / 100)

Comparison of Muriatic Acid Strengths
Strength (%) Amount Needed (liters) to lower alkalinity by 100 ppm in 10,000 liters
31 3.23
33 2.94
35 2.71
  • Always wear appropriate safety gear when handling muriatic acid.
  • Add muriatic acid slowly to the water, ensuring it’s well-dispersed.
  • Test the water’s pH and alkalinity levels regularly to maintain balance.
What happens if I add too much muriatic acid?

Adding too much muriatic acid can lower the pH too much, making the water acidic and potentially harmful. It can also damage pool equipment if left unchecked.

Muriatic acid being added to a swimming pool Water treatment plant using muriatic acid

Centers for Disease Control and Prevention – Safety guidelines for handling acids.

U.S. Environmental Protection Agency – Water quality criteria for alkalinity.

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