3.0 shows how much more efficient this pump system is compared to standard pumps that usually have a CPI of 0.5 to 1.5 . This dial adjustment, a solid-state electronic controller, allows you to change your horsepower , and compensate for almost any pump head requirement, so it gives you greater latitude in pump selection. Turn your pump down, while still providing good aeration and filtration. If you have too much horsepower, then you are wasting amps and money, and could actually damage your equipment. If you pump is undersized its life can be considerably shortened.
Higher amps means more money down the drain, Lower amps means saving more money.
With a Money Saver Pump you dial your savings. 1st - they use specially constructed super premium efficiency motors. The power input requirements vary with the cube of the speed change. You can save a lot of money without sacrificing any performance. There is even a 3rd potential savings source although we do not count it here.