Sani Marc 30-92222-02 Pure 2Kg Azure Shock is a shock treatment designed to clear cloudy water by killing bacteria and destroying contaminates in your pool. Sani Marc Shock targets organic waste such as perspiration, body oils, and cosmetics that can linger in water. This reactive treatment also helps to prevent algae build up and keeps your pool in pristine swimming condition. Enjoy clean and clear water with Sani Marc cleaning products.