The model CW-CO3P is specifically designed to treat tanks up to 1,200 gallon capacity with high organic loading. This system utilizes a combination of ozone, hydrogen peroxide, and ultraviolet light to create a hydroxyl radical, which actually oxidizes the contaminants to harmless carbon dioxide and water. A supplied pump circulates the water from the tank through a venturi, then through the ultraviolet ozone generation chamber, and returns it to the tank. Available in two sizes: ST - up to 800 gallons, and XL - up to 1200 gallons.