Powerheads are electrical units with motors that are sealed to allow them to be submerged. Powerheads are usually used to circulate the water in your aquarium, which increases the amount of oxygen in your tank. They can easily be hung or mounted on the side or back of the aquarium. The larger high performance units can be used for pumping water through a wet/dry tickle filter, or running a venturi type protein skimmer. Powerheads are beneficial to the health of your aquarium in many ways, the more circulation; the better the water quality is, etc.

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