Well, I'm in the final phases of pool construction and just hit on an expensive idea. My pool is about 30k gallons and will have a waterfall/slide feature. I currently plan to have two seperate two-speed pumps. One pump for the pool and one for the waterfall/slide.

I just ran across the Pentair Intelliflo information. They claim power savings of 90% with custom variation on the exact water flow. So, I could have numerous exact flow rate settings which I could select. The nice thing is it operates on flow rate, not power selection, so it should match my power needs exactly. No excess. According to the web site calculation I should save ~$1K dollars a year based on the flow rate accuracy and efficiency of the motor.

OK, so that's the solution based on the Pentair web site sales pitch. Now for the reality check! Anyone out there actually have one of these pumps on their pool? I would greatly appreciate any feedback before I drop and extra $600 on this pump.