Penn Plax Action Aerating Skeleton & WheelPenn Plax Action Aerating Skeleton at the Wheel turns your once simple aquarium into the spooky depths of the sea. As bubbles rise the phantom pirate appears to be moving the wheel. Requires air pump, tubing and gang valve (not included). Bubble action makes phantom pirate move the helm Provides aeration for a healthy aquatic environment Safe for all aquariums Aeration maximizes the amount of oxygen present in the tank, leading to healthier, more