So the nanostream came in yesterday. And I haven't put it in my tank yet, but I did put it in the sink. And man, I have to say for the size it moves water! Even though they have "comparable flow," I think that the Nano 6025 is much stronger than the Seio 620. Plus, the Seio is a pain to suction to the glass, and this comes with a nice magnet holder. Anyway, just an update!
-Chris