A remotely controlled and monitored spa. An interface signal converter is electrically connected to a spa controller. A remote computer can control the spa and monitor the status of the spa via a communications link between the remote computer and the interface signal converter. The interface signal converter converts communications signals transferred from the remote computer via the communications link and directs the converted signals to the spa controller. Also, the interface signal converter converts signals from the spa controller to be communicated to the remote computer via the communications link. In a preferred embodiment, the interface signal converter comprises an IR and an RS-485 transceiver. In a preferred embodiment, the communications link is the Internet.