Rainwater tanks are no longer a thing of the past. More and more, governments, and the taxpayers they represent, realize their value in the desperate fight to preserve water. RainFresh is the natural addition to any rainwater tank, especially in urban areas. RainFresh returns the water from any tank to its pristine state. All impurities and pollutants collected in the tank are eradicated by this totally natural filtration and treatment unit. It's easily installed, extraordinarily effective, and virtually maintenance free. And even more important, there's no need for chlorine or any other chemical.