The Eisbecher Series consist of 20 different reservoirs that differ between usage, measurement and appearance. There are ten reservoirs within this series that consist of 99% plexi - totally unique! But the main difference between these reservoirs is within the functionality of the different sockets. These are two versions for everyone that would rather operate the pump seperately. The Bubble Down and depending on the size one or two standpipes that fascilitate the "Lighttower" effect and two lighting modules one from the top and the other one from the bottom are being used here. And there are additional three LED holes for the plexi version to maximize the lighting power. The openings to fill or drain the liquid are doubled here: One at the side and one at the bottom.