Osmolator 3 Nano Auto Top Off

Reliable Automatic Top Off for Aquariums Up to 66 Gallons

• Automatically Maintains a Consistent Water Level
• Precision Optical Sensor with 0.5mm Detection Accuracy
• Includes Quiet, High-Performance Turbelle High Jet 5030 Pump
• Adjustable Safety Timer and Built-In Pump Protection
• Easy Plug-and-Play Setup with a 5-Year Warranty

Keep your aquarium's water level consistent without the hassle of manual top offs. The Tunze Osmolator 3 nano automatically replaces water lost to evaporation, helping maintain stable salinity in saltwater aquariums and consistent water levels in freshwater setups. Designed for aquariums up to 66 gallons, this compact automatic top off (ATO) system combines a precision optical sensor, quiet fill pump, and built-in safety features into an easy-to-install package.

The Osmolator 3 nano uses a single optical sensor to monitor your aquarium's water level with an accuracy of 0.5mm. When the water level drops, the included Turbelle High Jet 5030 pump automatically delivers freshwater from a separate reservoir until the proper level is restored. With magnetic mounting, preconfigured controls, and no app or software setup required, the system is ready to go right out of the box. Just add a freshwater reservoir.

Precise and Reliable Water Level Monitoring

The Osmolator 3 nano features an advanced optical sensor designed to maintain a consistent water level while resisting interference from air bubbles, deposits, and scratches. Its reinforced transparent housing is made from durable Eastman Tritan copolyester, offering excellent impact resistance and long-term durability. Discreet status LEDs provide a clear indication of system operation while minimizing unwanted light around the sensor.

Quiet, High-Performance Refill Pump

The included Turbelle High Jet 5030 pump delivers up to 42.3 gallons per hour with a maximum head height of 9.84 feet, providing plenty of flexibility for positioning your freshwater reservoir. Its three-phase sine-wave drive delivers smooth, quiet operation, while integrated dry-run and blockage protection help protect the pump from damage. A protective intake strainer also helps prevent larger debris from entering the pump.

Built-In Safety Features

To help prevent accidental overfilling, the Osmolator 3 nano features an adjustable safety timer that limits how long the refill pump can operate during a single top off cycle. Two maximum dosing durations are available, allowing you to select the setting best suited to your aquarium's size and evaporation needs. Combined with the optical sensor and integrated pump protection, these safeguards help provide dependable everyday operation.

Simple Installation and Flexible Mounting

The compact design makes the Osmolator 3 nano easy to install in an aquarium sump or directly in the display aquarium. The included magnetic sensor holder accommodates glass up to 12mm thick, while the separate tubing holder supports glass up to 22mm thick. With 9.8 feet of flexible tubing, a 12V power supply, and reusable hook-and-loop cable straps, installation is about as easy as it gets.

Specifications

• Recommended Aquarium Size: Up to 66 Gallons (250L)
• Water Level Detection: Optical Sensor
• Number of Sensors: 1
• Sensor Accuracy: 0.5mm (0.02")
• Included Pump: Turbelle High Jet 5030
• Maximum Pump Flow Rate: 42.3 GPH (160 L/h)
• Maximum Head Height: 9.84 Feet (3m)
• Maximum Sensor Glass Thickness: 0.47" (12mm)
• Maximum Tubing Holder Glass Thickness: 0.87" (22mm)
• Tubing Length: 9.8 Feet (3m)
• Power Consumption: 0.7W Monitoring / 5W Pump Running
• Controller Voltage: 12V DC
• Power Supply Input: 100-240V AC, 50/60Hz
• Operating Water Temperature: 32-95°F (0-35°C)
• Warranty: 5 Years

What's Included

• Osmolator 3 nano Controller with Optical Sensor
• Turbelle High Jet 5030 Dosing Pump
• 12V Power Supply
• Magnetic Sensor Holder
• Tubing Holder
• PU Tubing (9.8 Feet / 3m)
• Protective Sensor Cover