Do you have an air pump on it?nomicon;2386397; said:Oh yeah, the other pipe you see near the bio tower is for air flow into the tower so the benificial bacteria is well oxygenated.
OK so it is a vent for the tower to trickle...nomicon;2386676; said:No air pump zen. The air is forced in by the pressure of the water. If I turn that valve on top of the air inlet, the water level rises and shuts down air intake.
