If you're looking for something completely different please start at the Store Directory Copper and silver have been used for centuries to sanitize water.
Copper is a well know algaecide and silver is a powerful bactericide.
In the ancient Greek and Roman civilizations, the royalty used to drink from silver goblets and their water was stored in silver urns in order to purify their drinking water. As the pioneer settlers moved west across the American continent, they learned to insured safe drinking water by putting copper and silver coins in their barrels of water and milk. In very basic terms, an ionizer consists of a set of electrodes, made of copper and silver, placed in a chamber that is mounted in the hot tub water recirculation system. An electronic controller sends a minute DC current to the electrodes, which in turn, dispenses copper and silver ions into the water which kill organisms. These ions are odorless and tasteless, and unlike ozone, are stable in water and provide a residual level, which is so important for safe, healthy water.