BIO-DEX CHXO1 1 lb Container Chlor-Ex Chlorine Neutralizer 32 per case. Chlor-Ex can remove extra chlorine in pools and spas, although chlorine is an effective sanitizer, it can be harmful at high levels. Over-chlorinating is an easy mistake to make. Too much chlorine will irritate swimmers and bathers and can be detrimental on filtration systems in spas or pools. Chlor-Ex removes the excess chlorine before it can damage the equipment and irritate swimmers’ skin and eyes. It’s easy to use and dissolves quickly leaving water properly balanced.