I plan on having a decent sized skimmer and no refugium. If the skimmer stays under 15 X 10 inches or so it should all fit. i figure about 5 inches for the return pump, an inch or two for the baffle and whatever space is left over for the skimmer.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.