Abstract: The present invention provides a complete, fully integrated system for chemical metering, computer software to control the system and methods for use with the system. In general, the chemical metering system comprises one or more means for holding at least one chemical, one or more means for moving at least one chemical to the fluid that is being treated, one or more means for moving the fluid that is being treated through the system, and a means for controlling the system such that at least one chemical is metered to the fluid being treated with high accuracy. In a preferred embodiment, the present invention is used for residential applications or for low flow/low volume industrial and commercial applications.