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The Difference Between Free Chlorine and Total Chlorine in Swimming Pools


Maintaining the cleanliness and safety of a swimming pool is a shared goal among swimming enthusiasts. Understanding the distinction between free chlorine and total chlorine in pool water is crucial to achieving this objective. This article will delve into the intricacies of these two chlorine types, their impact on the pool environment, and overall health.

Part 1. What Are Free Chlorine, Combined Chlorine, and Total Chlorine?

Free Chlorine:

Free chlorine is a potent disinfectant added to swimming pools to eradicate bacteria and pathogens. It ensures the pool's water quality remains clean, providing a safe swimming environment.

Combined Chlorine:

Combined chlorine is a product formed by the reaction between free chlorine and organic compounds present in the pool water, such as sweat and urine. Although not active in the disinfection process, it can contribute to an unpleasant chlorine odor and discomfort.

Total Chlorine:

Total chlorine is the sum of free chlorine and combined chlorine. It represents the overall chlorine concentration in the swimming pool and is a key parameter for monitoring water hygiene.

Part 2. Maintaining Appropriate Chlorine Levels

Sustaining proper chlorine levels is paramount for water quality and swimmer health. Ideally, free chlorine should be maintained within the range of 2.0 to 4.0 ppm, with total chlorine levels closely aligning with free chlorine. The combined chlorine level should be kept below 0.5 ppm to avoid irritation and discomfort.

Part 3. Effects of Excessive Free Chlorine

Elevated levels of free chlorine can lead to irritation, red eyes, skin itchiness, peeling, dry and brittle hair. When concentrations exceed 10 ppm, the situation can worsen, impacting the respiratory system, causing hair discoloration, and skin issues. To prevent these problems, adjustments are necessary until free chlorine levels drop below 5 ppm, preferably below 3 ppm, ensuring pool safety.

Part 4. Benefits of Choosing PoolClever Chlorine Tablets

Optimal chlorine balance in the pool can be easily achieved, especially with the use of PoolClever chlorine tablets. These tablets contain 90% available chlorine and 99% trichloroisocyanuric acid, ensuring both water cleanliness and health. By utilizing PoolClever chlorine tablets, you can confidently enjoy swimming, whether in the scorching summer or chilly winter.



Understanding the distinction between free chlorine and total chlorine and maintaining appropriate chlorine levels are vital for pool water cleanliness and swimmer health. Opting for PoolClever chlorine tablets enables you to effortlessly uphold chlorine balance, creating a safe, clean, and comfortable swimming environment. Whether you're a professional pool caretaker or an avid swimmer, proper chlorine balance enhances your aquatic experience with enjoyment and peace of mind.

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