[Wilty]

I know this is a over hashed topic, but I was wondering what people prefer. I'm going to be designing one shorting with a referium (spelling?). I will have a good length under my main tank, I was thinking 5 feet long. So what is the train of thought?

START Bio Balls -> Referium -> foam pads -> skimmer & reactor -> pump FINISH

?? Skimming before the referium?