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; this item is not for sale in Catalina island * Restores sparkle to cloudy water; reduces sanitizer demand * Measures 9.6-inches in length by 3.3-inches in width by 3-inches in height