Tunze Osmolator 3 Nano Auto Top Off
Tunze Osmolator 3 Nano Auto Top Off is backordered and will ship as soon as it is back in stock.
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The Tunze Osmolator 3 Nano (3151.000) replaces evaporated water in aquariums up to about 250 L (66 US gallons). Its optical sensor controls the water level, with two selectable maximum dosing times to suit the installation.
Check the fit
- Sensor magnet: fits glass up to 12 mm thick.
- Tube holder: fits edges up to 22 mm thick.
- Maximum delivery height: 3 m (9.84 ft).
- Reservoir opening: allow at least 75 mm for the standard pump connection.
Included in the system
- Optical sensor assembly with protective cap and magnetic mount.
- Turbelle High Jet top-off pump, 12 V power supply, 3 m of tubing and a tube holder.
What you will need
Provide a separate top-off reservoir and suitable freshwater. For marine aquariums, evaporation is replaced with freshwater, not mixed saltwater. Mount the sensor where the water level changes with evaporation, such as the sump’s return chamber, and position the delivery tube as shown in the manual to prevent siphoning.
Compare Osmolator 3 and Nano
| Feature | Osmolator 3 | Osmolator 3 Nano |
|---|---|---|
| Model | 3154.000 | 3151.000 |
| Level sensing | Optical sensor + independent thermal safety sensor | Optical sensor |
| Aquarium | Aquarium or sump installation | Up to about 250 L (66 US gal.) |
| Sensor mount | Glass up to 15 mm | Glass up to 12 mm |
| Pump height | 3 m standard; 6.2 m boost | 3 m |
| Timer | 10-minute limit | Two selectable maximum dosing times |
Care and warranty
Check the sensor regularly and clean it as directed. Tunze’s general limited warranty is 5 years for materials and workmanship; wear parts such as pump drives and bearing washers have 2-year coverage. Refer to the manual for conditions and regional terms.
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