Smart Auto Top Off, Temperature Monitoring & Leak Detection in One System

The Red Sea ReefATO+ 3-in-1 Smart Auto Top Off System combines three essential reef aquarium functions into one intelligent, connected system: automatic top off, digital temperature monitoring, and leak detection.

Designed specifically for saltwater aquariums, ReefATO+ automatically replenishes water lost through evaporation to help maintain stable water level and salinity while continuously monitoring other critical conditions around your aquarium.

Connected through the Red Sea ReefBeat app, ReefATO+ gives you real-time system information, historical data, alerts, and additional safety features directly from your compatible mobile device.

3-in-1 Reef Aquarium Protection

Automatic Top Off

The solid-state titanium water level sensor monitors the aquarium's water level and automatically activates the included ATO pump when freshwater needs to be added.

Backup pump-off probes are positioned above the normal operating level to provide additional protection against overfilling.

Digital Temperature Monitoring

A temperature sensor is built directly into the ATO sensor and provides accuracy of ±0.1°.

Through ReefBeat, you can set desired and acceptable temperature ranges and receive notifications when aquarium temperature moves outside your acceptable range.

The system also maintains detailed temperature history, including minimum, maximum, and average readings.

Leak Detection

The included Reef-Spec leak detector uses titanium probes capable of detecting water ranging from RODI to seawater.

When a persistent leak is detected, ReefATO+ disables automatic top off and can provide an audible alarm and smartphone notification.

Smart Safety Features

ReefATO+ is designed with multiple safeguards to help prevent common ATO problems.

The system can automatically shut down the ATO pump if:

• The water level sensor becomes disconnected
• The pump operates significantly longer than expected
• The freshwater reservoir runs dry
• The pump stalls or becomes disconnected
• A leak is detected

The solid-state EC water level sensor has no traditional moving float mechanism and incorporates backup pump-off probes for additional protection.

ReefBeat Smart Control

Connect ReefATO+ to the Red Sea ReefBeat app for remote monitoring and system information.

ReefBeat allows you to:

• View the current water level
• Monitor aquarium temperature
• Set desired and acceptable temperature ranges
• Receive temperature alerts
• Receive leak notifications
• Receive alerts when the freshwater reservoir runs dry
• Review top-off activity and water-added history
• Review detailed temperature history
• Manage leak detector settings
• Integrate ReefATO+ with compatible Red Sea ReefBeat equipment

When incorporated into the ReefBeat ecosystem, the leak detector can also be used with Emergency Quick Actions to shut down compatible equipment such as ReefRun return pumps.

Quiet Variable-Flow ATO Pump

The included 12V DC ATO pump is compact, quiet, serviceable, and automatically adjusts its performance to the installation.

Maximum Flow: 300 L/h / 75 GPH
Maximum Head: 2.5 m / 8 ft
Power: 6–10W
Pump Diameter: 4.5 cm / 1.8"

The controller automatically adjusts pump speed to maintain an approximate top-off flow of 72 L/h / 18 GPH for quieter, controlled freshwater delivery.

Key Features

• Automatic freshwater top off
• Helps maintain stable salinity and water level
• Solid-state EC titanium water level sensor
• Backup high-water pump-off probes
• Integrated digital temperature sensor
• ±0.1° temperature accuracy
• Separate Reef-Spec titanium leak detector
• ReefBeat Wi-Fi connectivity
• Smartphone alerts and notifications
• Top-off activity history
• 28-day temperature history
• Variable-flow 12V DC ATO pump
• Automatic dry-reservoir detection
• Pump stall and disconnect detection
• Automatic shutdown when a leak is detected
• Audible leak alarm option
• Siphon breaker included
• Designed specifically for saltwater aquariums

What's Included

• ReefATO+ Smart Controller
• Solid-state ATO and temperature sensor
• Variable-flow ATO pump
• Reef-Spec leak detector
• Sensor holder
• Magnetic corner mounting bracket
• Approximately 10 ft of silicone tubing
• Silent-flow tube holder
• Siphon breaker
• Installation accessories

Compatibility & Installation

The included magnetic sensor mounting bracket is designed for glass up to approximately 1/2 inch / 12 mm thick.

The tube holder clips onto sump glass from approximately 4–12 mm thick.

Important: ReefATO+ is designed for saltwater aquariums only.

A freshwater/RODI reservoir is required for automatic top off and is not included unless specifically stated.

Why Buy From Infinity and Beyond Aquatics?

Infinity and Beyond Aquatics carries smart aquarium equipment designed to make reef keeping safer, easier, and more consistent.

The ReefATO+ goes beyond a traditional automatic top-off system by combining water-level management with temperature monitoring, leak detection, smart alerts, and multiple built-in safety features in one connected platform.

Shipping

FREE Shipping

This product qualifies for free standard shipping within the contiguous United States.

Orders may ship separately from other products depending on inventory location and availability.

Brand: Red Sea
Product: ReefATO+
Type: 3-in-1 Smart Auto Top Off System
Compatibility: Saltwater Aquariums Only
App: Red Sea ReefBeat