Running NPX biopellets (about 400mg) in my phosban 550 reactor. I get a little tumble, but not much at all. Soaked pellets in RODI for 24 hours before installing. Seems like the pump just isnt enough? Any thing else it could be? Here's a youtube...
http://www.youtube.com/watch?v=qJutahqXGFY
http://www.youtube.com/watch?v=qJutahqXGFY