Rio Aqua Pumps/Powerheads have long been known as an
aquarium workhorse. They deliver water at a very high
pressure, making it very suitable as a sump return pump.
Most aquarists with a Berlin skimmer have turned to
the Rios to deliver a sufficient quantity of water to
maximize the foaming action. Users have noted that the
Rios require regular maintenance for them to function
at their peak, and have a high failure rate with these
units when used with wave makers. Overall, these units
are excellent for "straight ahead" water movement
and will always be a good value.