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How long do chlorine tablets last in water?

Published in Pool Maintenance 2 mins read

Based on the provided reference, HTH™ Chlorine Tabs are designed to dissolve slowly and last up to one week in the water.

Chlorine tablets like HTH™ Chlorine Tabs are manufactured to dissolve gradually, releasing sanitizing chlorine into the pool water over time. This slow dissolution process helps maintain a consistent chlorine level, which is essential for keeping the water clean and safe. The reference specifically notes that HTH™ tabs are sun-protected, which helps contribute to their longer lifespan in the water by reducing degradation from UV rays.

While the dissolution rate can be influenced by factors such as water temperature, water flow, and the tablet's placement (e.g., in a skimmer, chlorinator, or floating dispenser), the HTH™ reference states they can last up to one week.

The reference also mentions different sizes of tablets are recommended for different pool types:

  • 1 inch chlorine tablets: Recommended for above ground pools.
  • 3 inch chlorine tablets: Recommended for inground pools.

Both sizes are designed to dissolve slowly, contributing to the extended life of up to one week.

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