The new eheim ecco pro 300 is a powerful efficient energy saving external filter for aquarium up to 300 litresr the very shape of this filter signals a new technical concept the practical carrier handle is a multi function lever and as such fulfils various functions it serves to activate the integrated priming function which facilitates start up during installation and after cleaningr with the handle the filter can also be opened or closed easily with a flick of the wrist at the same t