This unique energy-efficient design reduces maintenance and produces less heat than traditional motor driven pumps. The needle mixing wheel impeller maximizes water and air mixture to ensure perfect bubble size and thus optimizing protein skimmer foam production. The pump is ideal for saltwater aquarium use; the ceramic shaft prevents wear caused by small debris that will destroy traditional stainless steel shafts. Because the pump has only one moving part, there are fewer things that can go wrong with it. The pump is backed by a one year warranty.