Whats the point of this Layton??
At the beginning of this thread, it was generally agreed that refugiums (thats right, look at the subject) were not good for nutrient export. Everyone agreed.
They have a number of other points that are positive, including adding system volume, which does provide stability, I don't think there is any argument in that, and is also good for dilution of nutrients in a one off problem or mistake albeit short term, i.e. if I accidently tip a whole cannister of food into my tank, or a large anenome dies. I'd much rather have either of these happen in a 1000l thank than a 250l tank.
Don't you think you are spending alot of unnecessary time explaining a theory that no one is really going to ever use.
I think we all understand that if a skimmer can only remove 80% of the waste products, you can dilute all you want, but eventually all water will end up with the same % of nutrient as the smaller volume started with, skimmer etc being equal.
What if you ref contained live rock, live sand, macro algae etc. They all remove nutrients as well as the skimmer. Can't see the point in this.