6th March 2005 at 11:28 am #595
Maintaining correct static water level: this is not an issue at all due to the particular design of the filter, in which the pipe at the bottom of the filter media is led up to a spout 3/4 up the filter. Thus static water level is automatically achieved. This is the one major technological advantage of this filter design (which Mr. Manz invented), as this guarantees that the schmutzdecke never dries out or is drowned under too much water so as to prevent access to sufficient amounts of oxygen (risk of anaerobic activity).
Adriaan