OK, the 25 watt power consumption is with the unit on standby and not while running.
Still not bad power consumption compared to other commercial filters out there.
I see they have made a number of improvements since the prototype video.
Yeah they had some bugs to work out, however, most of the people that bought them are very happy with them from what I have seen on the Koiphen Forum. Customer service seems to be really good.
Here's another one that may be available to the Koi folks:
http://www.koiphen.com/forums/showthread.php?141408-Profidrum-RDF-is-coming-to-the-US