Pool Alkalinity: A Comprehensive Guide


In this comprehensive guide, we will walk you through the steps to both raise and lower the alkalinity of your pool effectively. Maintaining the ideal alkalinity levels in your pool is crucial for a clean and comfortable swimming environment. Whether you need to increase or decrease the alkalinity, this guide has you covered.

Why Alkalinity Matters

Balanced Water Chemistry

Proper alkalinity in your pool is essential for balanced water chemistry. Alkalinity acts as a buffer, stabilizing pH levels. When alkalinity is within the recommended range, it prevents rapid pH fluctuations that can lead to various water-related problems.

Comfortable Swimming Experience

A well-maintained pool with the right alkalinity provides a comfortable swimming experience. Water that is too acidic or too alkaline can irritate the skin, eyes, and mucous membranes, affecting your swimming pleasure.

Preventing Corrosion and Scaling

Correct pool alkalinity helps prevent corrosion of pool equipment and scaling on pool surfaces. Water that is too aggressive or too soft can lead to these issues, causing damage to your pool infrastructure.

unbalanced alkalinity effects on hot tubs

Testing Pool Alkalinity

Before you can raise or lower alkalinity in your pool, it's essential to know the current levels. You can easily test the alkalinity using Amano. It will automatically test the alkalinity in the pool and then send you a direct report. In this report, Amano will notify you of any imbalances in your pools alkalinity with specific instructions of how to resolve the imbalance. You may also use a pool water testing kit, available at most pool supply stores. Follow the manufacturer's instructions for accurate results.

How to Raise Pool Alkalinity

1. Baking Soda (Sodium Bicarbonate)

Baking soda is a commonly used and effective method to increase pool alkalinity. To use it:

  • Calculate the required amount based on your pool size.
  • Add the baking soda gradually to the pool water, starting with the deep end.
  • Use a pool brush to ensure thorough mixing.

2. Soda Ash (Sodium Carbonate)

Soda ash is another option to raise alkalinity, but it will also increase the pH of your pool water. To use it:

  • Calculate the amount needed based on your pool's size.
  • Dissolve the soda ash in a bucket of water.
  • Add the solution to your pool, pouring it around the perimeter to ensure even distribution.

3. Alkalinity Increaser

Alkalinity increasers are commercially available products designed specifically for raising pool alkalinity. Follow the manufacturer's instructions for the correct dosage.

How to Lower Pool Alkalinity

1. Acid

To lower the alkalinity of your pool, you can use muriatic acid or dry acid. Be cautious when using acid, as it can be corrosive. Here's how to do it:

  • Calculate the required amount based on your pool size.
  • Add the acid slowly to the pool water in the deep end.
  • Allow the pool pump to run for several hours to circulate the water and mix in the acid.

Adjusting pH Levels

After raising or lowering the alkalinity, it's essential to check and adjust the pH levels, which should ideally fall in the range of 7.4 to 7.6. Use pH increasers or reducers as necessary to achieve the right pH balance.

Maintaining Alkalinity

To keep your pool's alkalinity within the recommended range:

  • Regularly test the water and make adjustments as needed.
  • Maintain proper pool circulation and filtration.
  • Avoid excessive use of pool chemicals, which can disrupt the balance.


In conclusion, maintaining the alkalinity of your pool is vital for a clean, comfortable, and safe swimming environment. Whether you need to raise or lower alkalinity, this guide provides you with the necessary steps. Regular testing, adjustments, and diligent maintenance will help you enjoy your pool to the fullest, free from water-related problems. Amano will make your job much easier because it gets rid of human error. It regularly tests alkalinity, along with other chemicals, twice a day and alerts you of any imbalances present. Amano will then give you exact instructions of what to use and how much to use to resolve the imbalance.

With this guide and Amano, you'll be well-equipped to maintain the ideal alkalinity levels in your pool, ensuring a fantastic swimming experience for you and your guests.

Changing the way we monitor water.

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