Red Sea ReefATO+ Auto Top Off System

Never worry about evaporation again with the Red Sea ReefATO+ Auto Top Off System. This all-in-one ATO unit combines a reliable water-level sensor, integrated pump, and built-in temperature monitor into a single compact package. The ReefATO+ connects to the free ReefBeat app for real-time alerts and remote monitoring, and it works with any aquarium — not just Red Sea tanks.

Features

• All-in-one design: water-level sensor, pump, and controller in a single housing
• Built-in temperature monitor with ReefBeat app alerts
• Integrated leak detector prevents flooding
• ReefBeat app connected for real-time status and notifications
• Compatible with any freshwater or saltwater aquarium
• Magnetic mount sensor — no suction cups or brackets needed
• Adjustable water-level set point for precise top-off height
• Safety shutoff prevents overfilling if sensor is displaced
• Quiet operation — ideal for bedroom or living room setups
• Easy setup with no external controller box required

Specifications

Frequently Asked Questions

Does the ReefATO+ only work with Red Sea aquariums?
No. Despite the Red Sea branding, the ReefATO+ is designed to work with any freshwater or saltwater aquarium. The magnetic sensor mounts to any glass or acrylic panel.

Do I need a separate reservoir for the top-off water?
Yes. You will need a freshwater reservoir (sold separately) that the ATO pump draws from. Any food-safe container works — just place the pump intake tube inside your reservoir.

What is the difference between the ReefATO+ and the ReefATO+ Upgrade Kit?
The full ReefATO+ system includes the sensor, pump, tubing, and everything needed for a complete installation. The Upgrade Kit is designed for existing Red Sea REEFER owners who already have a pump and reservoir — it adds the smart sensor and ReefBeat connectivity to their setup.