Ozone comes in two forms Gaseous and Aqueous (in Water). It is a naturally occurring chemical but can also be manmade. Ozone is O3. A molecule made up of 3 oxygen atoms, it is a gas that is colourless with a distinct pleasing scent. Aqueous Ozone is the end result of water and air that has had an electrical charge pass through it. It is known as natures most effective and natural sanitiser.