Pool Chlorine Demand

Chlorine demand is the amount of chlorine required to effectively sanitize pool water and break down contaminants.

What Causes High Chlorine Demand?

  • High levels of organic contaminants like leaves, dirt, and oils.
  • Presence of chloramines that bind to free chlorine.
  • Heavy bather loads or recent rainfall introducing impurities.

How to Fix High Chlorine Demand

  • Shock the pool to break down contaminants.
  • Maintain proper filtration and remove organic debris.
  • Ensure stabilizer levels are balanced to prevent chlorine loss.

Related Terms

  • Free Chlorine (FC) – The active and available chlorine that sanitizes pool water.
  • CC (Combined Chlorine) – Chlorine that has combined with contaminants and is no longer effective.
  • Shock Treatment – The process of adding a high dose of chlorine or oxidizer to break down contaminants.

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