What is a power head filter?

A power head filter is a type of aquarium filtration device that combines a water pump and a filter in one unit. It is typically mounted on the side or back of the aquarium and uses a motor to draw water through a filter media, effectively removing debris and impurities. Power head filters can also be used to create water movement, which benefits aquatic life by promoting oxygen exchange. They are versatile and can be adapted for various aquarium sizes and setups.