I have a 40ish gallon aqueon sump with dual over flows. I'm not using the second overflow but I have a 27 cube I'm going to plumb into it.
3, 4 inch 100 micron filter socks
950 gph return
2 1400 gph circulation pumps
phosban reactor
magnum 350 with 1 lb carbon basket (no filter)
9w uv
5 gallon auto top off
reef octopus skimmer
4 t5 ho 60" fixture
in the process of upgrading to 3 AI Sol led and wave maker.