Does anyone have experience with the air/bubble pumps such as the Feri Pump and how this might compare w/a traditional sub pump? The ads make it look attractive (easily maintained), but don't compare cost to run.
The Feri interestes me because my current sub pump needs replacing resulting from wear by very fine grit over 3 years. Not liking the though of replacing a pump over such a short span.
Thx,
Robert