Xtra Blue 3" Long-Lasting Chlorinating Pucks is a multifunctional sanitizer that controls and kills bacteria and algae in swimming pool water. This formula contains a metal stain inhibitor, scale preventative and water softening agent. This sanitizer will last longer compare to chlorine products such as liquid bleach or calcium hypochlorite, as it contains sunlight-protected chlorine. It’s the perfect solution for clear, inviting pool water.
• Controls and kills bacteria and algae in swimming pool water