OK here's my question.
I purchase a Variable Speed controller such as: SMV AC Vector Drive - ESV751N02YXB
It cost about $200. ESV751N01SXB ESV751N01SXB 751N0: 1 HP (.75 kW) 1SX: 120-240 Volt, Single Phase $218.90
Pick up a 3 phase motor: 1HP 3 phase square mount another $200
So for $400....
Mount it to a 1HP Intelli flow body or use as a replacement for a 1 HP. Then you have a Variable Speed Pump
Also see this video:
http://www.vegetablegarden.tv/video/xHY ... h-POT.html
Any one willing to chime in?
(added links for controller)