How To Lower Alkalinity In Your Swimming Pool?

How To Lower Alkalinity In Your Swimming Pool

Alkalinity is a crucial aspect to take into account when looking after a pool. Alkalinity is the capacity of water to neutralize acids, to put it simply. Too much alkalinity in a pool can result in a number of issues, including cloudy water, shifting pH levels, and equipment damage. In this article, we’ll go over how to reduce the alkalinity in your swimming pool and keep it at the right levels for a secure and pleasurable swim.

Understanding Alkalinity and its Impact

It’s crucial to first comprehend the factors affecting alkalinity in a swimming pool before learning how to reduce it. Alkalinity levels are influenced by both pH and total dissolved solids (TDS). Higher TDS and pH levels can result in higher alkalinity levels. The temperature can also make a difference. Higher alkalinity levels may result from water’s increased capacity to retain dissolved minerals as temperature rises.

Too much alkalinity can lead to a chain reaction of problems. It can result in pH level fluctuations, making it challenging to keep the pool’s pH at the right level. In addition to looking unpleasant, cloudy water brought on by high alkalinity can make it challenging to see the pool’s bottom. Additionally, it may harm pool equipment by corroding or discoloring metal components.

Lowering Alkalinity

A pool’s alkalinity can be reduced using a variety of techniques. The method that is used most frequently is acid. Hydrochloric acid also referred to as muriatic acid, is frequently used to reduce alkalinity levels. The way this acid works is by making the water more acidic by neutralizing the alkalinity in it.

A pH reducer is an additional choice. These chemical substances function by concentrating on and neutralizing the particular minerals that cause high alkalinity levels.

Alkalinity levels can also be decreased by using algaecides. By removing dissolved minerals, these chemicals can aid in lowering alkalinity levels while also killing bacteria and algae in the pool. Algaecides must, however, be used as a last resort and only in cases where all other methods have failed.

To reduce alkalinity levels, sequestering agents can also be used. They function by combining dissolved minerals to prevent them from raising alkalinity levels.

Testing Alkalinity Levels

You must test your pool’s alkalinity frequently to determine whether it needs to be adjusted. Alkalinity levels can be measured using a variety of test kits. In some test kits, a sample of pool water is mixed with drops or powders, while in others, test strips are used.

The procedures for determining the alkalinity levels are typically the same regardless of the test kit type used. Take a sample of the pool water and put it in a clean container first. Next, measure the alkalinity level according to the instructions included with the test kit. Between 80 and 120 ppm is the ideal range for alkalinity in a swimming pool.

Prevention and Maintenance

To keep high alkalinity from recurring after you’ve successfully reduced the alkalinity levels in your pool, it’s crucial to maintain them. The most crucial action is to keep routinely testing the alkalinity levels. Keep an eye on the TDS and pH levels as well because they can both affect alkalinity.

Maintaining a clean and debris-free pool is another good habit. Debris in the pool, such as leaves and other organic matter, can decompose, causing TDS levels to rise and, as a result, alkalinity to rise. To maintain crystal-clear water, it’s also a good idea to shock your pool on a regular basis.

It’s crucial to monitor and use the proper amount of chemicals when adding them to the pool. Over-chemicalizing a pool can increase TDS levels and produce high alkalinity. Before adding any chemicals, make sure you’re using the right amount by consulting a professional or your pool’s chemical usage manual.


In summary, keeping the right alkalinity levels in a pool is essential for a secure and enjoyable swimming experience. High alkalinity can cause a number of problems, including cloudy water, erratic pH levels, and damage to pool equipment.

Alkalinity levels in your pool should be kept under control with the help of methods for lowering alkalinity, regular testing of alkalinity levels, and appropriate maintenance. Always test the water after making any adjustments, and always be patient and make small adjustments at a time.