A new powerhead - watch the video.

[muck]

Originally Posted by Jaws

So let me get this straight. Do you have to drill your tank for this to work? That would be perfect for behind rock work too.

Nope.

The VorTech minimizes the intrusion of equipment in your tank by using a patent pending bracketless design; this allows the motor to be on the outside of the aquarium and uses a magnetic field to transfer torque through the aquarium wall to the propeller located in the water.