top of page
Tunze Osmolator Universal 3155

Tunze Osmolator Universal 3155

SKU: T552

The Tunze Osmolator Universal 3155 ensures a stable water level in aquariums, crucial for the well-being of sensitive aquatic inhabitants. Developed in 1985, it remains a cornerstone in aquarium technology, offering reliability and ease of use. The Osmolator comes as a compact unit complete with a low-voltage pump, mounting magnets, tubing controller, and power supply, requiring only a reservoir and water for setup. Its optical mini sensor precisely detects water levels, while the Controller 5017 provides visual indications and alarms for any issues. The system features redundant safety measures, including a proprietary optic sensor and a safety float switch to prevent overflows or pump failures. Easy to mount with a Magnet Holder, it's suitable for various setups, from cabinet filter plants to Comline filters or direct aquarium placement. The comprehensive package ensures hassle-free installation and peace of mind for maintaining optimal aquarium conditions.

Sold Out

Tunze Osmolator Universal 3155


High-tech - for a reliable water level in the aquarium

In 1985 TUNZE® invented the automatic refill system for aquariums. At that time, some people regarded this invention as a useless accessory.... but they forgot something very important: sensitive aquarium animals need a constant osmotic pressure within their cells. The Osmolator® (osmotic regulator) is very easy to install and provides its complete functionality in a single compact unit. Only the Osmolator® is able to provide you with the necessary security and reliability, since it is based on the vast experience that TUNZE® has been able to gather throughout the course of many years.
The Osmolator® will be supplied with low voltage pump, mounting magnets, tubing controller and power supply. You only need a reservoir and water.

  • An optical mini sensor recognizes the water level precisely.
  • The Controller 5017 displays all functions optically and sounds an alarm in case of failures.

  • Easy to mount by Magnet Holder.

  • Redundant security: the main sensor is a proprietary optic sensor. Should that fail a safety float switch shuts the unit off and sounds an alarm. Even if that fails safety circuitry shuts off the pump after 10 minutes.


The Tunze Osmolator Universal 3155 is a water level regulator with two sensors suitable for use in cabinet filter plants, in Comline filters or directly on the edge of the aquarium.


Whats in the box

  • Ready for mounting with power supply unit,
  • metering pump,
  • hose,
  • magnet holder for sensors.
bottom of page