GLB Pool & Spa Products 71420 20-Pound Oxy-Brite Pool Water Cleaner For more than 30 years, Oxy-Brite has offered a non-chlorine alternative for shock oxidizing pool water. In addition to its effective shock oxidation treatment, Oxy-Brite includes unique blue water brightening crystals that polish the water. Swim immediately after treatment! Restores sparkle to cloudy water Reduces sanitizer demand This item is not for sale in Catalina Island