The Natures Pure Mineral System uses a natural synergy for a holistic approach to water maintenance. First, the System Chamber disperses natural minerals into the water, such as copper and silver, which serves as natural sanitizers and algaecides. By simply adjusting the dial, these natural mineral levels can be adjusted and maintained to their ideal levels. In addition, these natural minerals are complemented by a family of ancillary products. The Natures Pure Chamber is an important component of the natural purification process. The Replacement Chamber must be replaced usually once a year. When the service light illuminates, this indicates that it is time to change the chamber with a Replacement Chamber.