Where we mention CPDI Champion 4-Pack Liquid Chlorine — 12.5% Sodium Hypochlorite, 1 gal each

• Free Chlorine in Pool Water: What It Is, Ideal Levels, and How to Raise or Lower It

  Liquid chlorine without added CYA · Best for: Routine FC correction when you want sodium hypochlorite instead of stabilized tablets

• Pool Chlorine Types: How to Choose the Right One

  Best when CYA is high · Best for: Adds chlorine with zero CYA and zero calcium