I'll give you options and you choose the appropriate pieces to combine and complement the whole...Based on what YOU want the end result to be...
As we get to each "phase" you will need to know what your "Goals" are, and then we'll pick and option out the components to reach these goals...
As many of the components for each phase are interdependant on each other for "balance" we will refer back to the "Big Picture" (combined Goals) to be sure they complement each other...
Here's a popular quote from my "Squidd Method for Setting Up a SW Aquarium System"...
And the last couple of posts pretty much show "why" this is so important...or we end up hitting a bunch of roadblocks...
Stand size needs to taken into concideration when planning the sump/fuge...Backwash and overflow layout are related when setting up the tank and S/F...Flow rates and skimmer size are important parts of "sizing" the chambers in the S/F...and so on..
So here's one for Leona... Your getting this tank and stand from a "Custom Builder"...Why can't he size the stand to fit a standard tank or build a tank to fit his stand...? Maybe he can...?
When I buld my stands...I size them big enough to fit a standard full size tank below them...I have no center or back brace to get in the way of "placing" or working on the S/F...
It's not impossible..
My 18" "deep" 125 had 20" of room below and my 24" deep 210 has 24 1/2" deep under it...(plus the length of the Main tank...):nope: