Algimycin winter algaecide is an EPA registered, non-foaming, non-metallic winter algaecide that keeps pools algae-free all winter * Oxy-brite chlorine free shock treatment oxidizes organic contaminants that cause odors, cloudy water, skin and eye irritation * Sequa-sol sequestering agent holds iron, manganese, copper and calcium in solution so these minerals do not react with other elements in the water * Contains everything you need to close your pool; makes spring pool opening hassle-free compatible with ozone, chlorine and bromine sanitizers * Measures 10.1-inches in length by 3-inches in width by 2.7-inches in height