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High Chlorine Levels in Pools

Have you ever wondered if too much chlorine in your pool could be harmful? Excessive chlorine levels can not only be dangerous for swimmers but can also damage your pool and its equipment. In this blog post, we'll explore the signs of over-chlorination, its effects, and how to correct it.

The Dangers of Excessive Chlorine

Overexposure to high levels of chlorine can lead to asthma, lung irritation, and even skin and eye issues. Beyond its impact on health, excessive chlorine is also detrimental to your pool's well-being.

How High Chlorine Levels Affect Pool Acidity

An elevated chlorine level can make your pool water more acidic by lowering its pH. This acidity can corrode metal pipes, pool equipment, and concrete surfaces. If your pool has a liner, the acidic water can cause damage to it, as well as to your pool cleaner.

The Role of Pool Covers in Chlorine Levels

One common reason for a spike in chlorine levels is the use of a pool cover. While the sun naturally depletes chlorine, a pool cover prevents this, causing chlorine levels to rise rapidly. If you're using a pool cover for extended periods, it's advisable to remove your pool cleaner. The high chlorine and low pH can make the cleaner's rubber components sticky, leading to deterioration and potentially voiding your warranty.

The Importance of Regular Testing

Regularly testing your pool water for chlorine and pH levels is crucial. Acidic water may appear clear and inhibit algae growth, but it's actually a significant problem.

The Hidden Costs of Low pH

Low pH levels, often resulting from high chlorine concentrations, can wreak havoc on your pool equipment and accessories, including:

  • Pool filters and pumps
  • Vinyl liners
  • Heater elements
  • Automatic cleaners
  • Chemical feeders
  • Maintenance equipment
  • Solar blankets

In essence, low pH can damage anything it comes into contact with.


Excessive chlorine in your pool is more than just a health risk; it can also damage your pool and its equipment. Regular testing and mindful management of chlorine levels are essential for maintaining a safe and functional swimming environment. Keep an eye on those levels to ensure a healthy, enjoyable pool experience for everyone.

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