Penn Plax Action Air Diver with EelThe Penn Plax Action Air Diver with Eel is a fun hiding place for tank inhabitants. It is a heavy weighted ornament with real underwater action. Beautiful enough to display! Aerating ornament with "eel" that rises and falls Unique design Heavy weighted This action aerating ornament depicts a knife wielding diver teasing a moray eel from a hollow log with a fish. As bubbles rise the eel rises and falls. Requires air pump, tubing and gang valve (not