All aquariums have one thing in common, and that is water and the need to move it. Powerheads are one of the devices that are meant to accomplish that task. Penguin and Maxi-Jet are two of the more common names in the realm of powerheads and much like their larger counterparts, powerheads are designed to perform well for many years as well. These small pumps will circulate your water, pump water out of a saltwater change reservoir, or lift water out of an undergravel filter. Whatever your need, a powerhead can handle the task.