Sera air filter (filer felt) for AIR 110 Plus,

Air filter for sera air plus air pumps, one piece.

What it fits: all three pumps in the range – sera air 110 plus, air 275 R plus and air 550 R plus. It is the only part shared by all three; the membrane modules come in two different versions.

What it does: the pump draws air from the room, and without a filter the dust in that room would travel through the membrane and the valves. The felt filter catches the dust before the membrane. A dirty filter throttles the air output, so if the pump has lost power while the membrane is intact, check this first.