Tunze Osmolator 3 Nano 3151 Auto Top Off ATO

The TUNZE Osmolator 3 nano is a simple and safe device with just one sensor for maintaining a constant water level in aquarium systems up to approx. 250 liters (66 US gal.), can be placed in cabinet filter systems or directly on the edge of the aquarium. The sensor works on glass panes up to 12 mm (1/2) . The hose holder holds up to 22 mm (0.87) .

Scope of delivery: ready to install with 12V power supply, low-voltage dosing pump, 3 m hose, hose holder, magnet holder up to 12 mm and protective cover for the sensor.

The large, precise optical sensor…

detects the water level with an accuracy of 0.5 mm, resists air bubbles, deposits and scratches.
Two levels of maximum dosing duration can be selected. This allows the dosage amount to be adjusted to the size of the aquarium.
The sensor of the Osmolator 3 nano 3151 holds on panes up to 12 mm (1/2″).

Plug & Play

All required components are ready for installation in the package (except reservoir). No software setup required. The fixed parameters are based on many years of experience.

Includes Turbelle High Jet 5030

Long-lasting high-tech dosing pump Turbelle High Jet 5030 with integrated dry running and blockage protection, a maximum delivery height of 6.2 m (20.34′) and pleasantly quiet operation thanks to a real 3-phase sine wave.

Hose included

The set includes a PU hose made entirely in Germany – low-emission, hydrolysis-resistant, microbe-resistant, flexible, but does not tend to kink when laid.

Compact all-in-one construction

With magnet holder and tube holder for an attachment to any aquarium edge or in the aquarium filter up to 12 mm (1/2″). The tube holder holds on up to 22mm (0.87″)

5 years warranty

“Built to last” according to our highest standards. Our exclusive service is automatically included. Without registration and without hidden hurdles. And of course always accommodating instead of petty-minded.

Made in Germany

It doesn’t matter whether it’s the special plastic parts from our own injection molding department, the winding of the motor, the soldering of the coils to the electronics, the encapsulation, the assembly of the individual parts and the testing of each pump, the pump is traditionally manufactured at our headquarters.