High-tech, for a reliable water level in the aquarium In 1985 TunzeR invented the automatic refill system for aquariums. 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 OsmolatorR (osmotic regulator) is very easy to install and provides its complete functionality in a single compact unit. Only the OsmolatorR 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.