Aquarium Water PumpsExternal water pumps, available in a variety of sizes, may be used as return pumps (from a sump or wet/dry filter), for closed loop circulation or to drive a protein skimmer. A powerhead is a submersible water pump generally used for water circulation within an aquarium or to power a protein skimmer.
$31.99If you are looking for a reliable, heavy duty powerhead for your small reef aquarium , then the Hydor Koralia Nano Circulation Pump/Powerhead 425GPH from Pet Store is definitely your smartest choice. The Hydor Koralia Nano Circ... Learn More