I purchased a 20L sump that was already built from a guy that ended up not using it. It will be going with my 40b that I am building.
My questions is how do these numbers look? was this meant to be a skimmer, fuge, return layout or was the return meant to be in the middle? the fuge seems awfully small if it is the middle chamber. Any input would be appreciated, I can move things now but won't in a few weeks.

