Well this is the best $75 I spent on a wavemaker. I picked up a pair of these from http://www.fish-street.com/. The wave maker has 12 modes and and the flow can be adjusted from the max flow of 3400 gph. It even has a sensor that slows down the flow at night.They will soon be releasing a wp60 which will be even a higher flow rate. I would suggest you guys give it a try if you are in the market for a new power head!!