Tunze Osmolator 3155 Automatic Top Off * REPLACED BY ALL NEW MODEL*



The one and only, Tunze Osmolator 3155. Our personal favorite automatic top off on the market today. With many built-in safeties, you can’t go wrong with this unit. German aquarium engineering at its finest!

This osmolator is very easy to install and provides complete functionality in a single compact unit. The primary sensor is a mini optical infrared sensor allowing for extremely precise regulation. A secondary float sensor serves as an independent back up. A ten minute timer shuts off the pump is the sensors fail.

We highly recommend this automatic top off and it is our personal choice on every reef tank in our store today.


Ships complete with tubing, pump and power supply and magnetic mounts for sensors.


Product Dimensions

10.2 x 2.5 x 6.4 cm ; 1.27 Kg

Out of stock

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