The AutoAqua Smart ATO RO G2 is an automated water reservoir filling system designed specifically for saltwater and freshwater aquarium enthusiasts who rely on reverse osmosis or deionization units. It eliminates the hassle of manually monitoring and refilling your RO/DI storage container, ensuring you always have clean water available for top-offs, water changes, or mixing new saltwater. By automating this critical process, the device prevents overflow risks associated with manual filling while guaranteeing a consistent supply of pure water for your reef tank maintenance routine.

This unit utilizes dual optical sensors for precise water level detection, featuring one low and one high sensor to control the solenoid valve operation. When levels drop below the low sensor, water flows until it reaches the high sensor, at which point the system shuts off automatically. Safety is prioritized with a built-in overflow timer and a mechanical float valve backup in case both optical sensors fail. The device supports magnetic mounting or bracket installation on glass up to 12mm thick and includes 9.8 feet of tubing with a maximum head height capability over twenty feet, all powered by a six-foot cord without requiring additional controls.

Ideal for reef keepers who want reliability and peace of mind regarding their water source management, this system is perfect for those running RO/DI units prone to TDS creep reduction through larger batch filling cycles. It suits hobbyists looking to save time on maintenance while protecting their equipment and home from potential water damage caused by reservoir overflows. Whether you are setting up a new system or upgrading an existing one, the Smart ATO RO G2 provides a plug-and-play solution that extends DI resin life and streamlines your aquarium care workflow.