What Is Free Chlorine in Swimming Pools?
Free chlorine is the active chlorine in your pool water that kills bacteria, viruses, and algae to keep it clean and safe. It stays available after you add chlorine, breaking down contaminants without forming harmful byproducts.
Maintaining free chlorine between 1 and 3 ppm prevents irritation and keeps your water clear. If levels drop or combined chlorine builds up, sanitation suffers.
Stick around to discover what affects these levels and how to keep your pool perfectly balanced.