they matt, we have one running at work on the 75 aussie tank. I have never been impressed with it at all. I think we have a mag 5 on it, or maybe even a 7? But anyways, we had to replace the riser tube to be a little taller to really get much of anything.
There's some guy on RC in Stamford selling one with a rio pump (not sure what size) for 65 bucks...but if its a piece of trash it may not even be worth that. My CSS does *ok*, doesn't sound like this would be much impromement, and it would require much higher flow rate.