Red Sea Reef Control - ATO Module

The Red Sea ReefControl ATO Module is an essential add-on designed to seamlessly integrate a complete, fail-safe Automatic Top-Off (ATO) system into your existing ReefControl Lite or ReefControl Pro controller.

It allows your main controller to manage water level stability and monitoring, eliminating the need for a separate ATO controller.

Complete ATO System

• ReefSense Digital ATO Sensor: Uses slim-line, multi-input titanium probes and Electrical Conductivity (EC) technology to accurately detect water levels. With no moving parts, there are no traditional float switches to clog, stick, or fail.

• Built-in Digital Thermometer: Integrated temperature sensor accurate to 0.1°C, providing a real-time, logged temperature reading from your sump or ATO chamber.

• Fail-Safe Protection: Built-in safety shutoff and backup probes help prevent accidental overfilling.

• ATO Pump: Compact 1.8" diameter, 12V DC pump operating at just 6–10W for quiet, energy-efficient operation.

• High Performance: Maximum flow of 300 LPH / 75 GPH with a maximum head height of 2.5 m / 8 ft.

• Serviceable Design: Easily disassembled impeller chamber makes routine cleaning and maintenance simple.

• Magnetic Sensor Holder: Corner mounting bracket fits aquariums with glass thicknesses up to 1/2".

• 10-Foot Silicone Tubing: Includes everything needed for installation.

• Siphon Breaker: Prevents accidental reverse siphoning.

• Tube Holder: Provides quiet, splash-free water delivery into the sump.

Smart ReefBeat Integration

Simply connect the ATO Module to an available port on your ReefControl Lite or Pro to unlock full integration with the ReefBeat App.

• Salinity Stability: Automatically replaces evaporated water to help maintain stable salinity, one of the most important parameters for coral health.

• 24/7 Monitoring: Tracks and logs top-off activity, water volume added, and water-level status.

• Temperature Automation: The integrated temperature sensor provides a dedicated sump temperature reading that can be used to trigger automation through the ReefControl Power unit, such as turning a chiller or fan ON/OFF.

• Critical Alerts: Receive notifications if the ATO runs excessively long, potentially indicating a leak or pump issue, or if the RO reservoir runs dry.

The Red Sea ReefControl ATO Module provides a smart, reliable, and fully integrated solution for automatic water top-off and temperature monitoring.

Available from Reef Supplies Canada, your Canadian source for Red Sea reef aquarium equipment and supplies.

Shop with Reef Supplies Canada for the ReefControl ATO Module and other Red Sea aquarium equipment.