help building my new tank

good day everyone, need your help.
i'm building a new glass tank, it's gonna be 6ft (lenght) x 1-1/2ft (width) x 2ft (height). about 120+ gal.

here's my questions:
1. how big will my sub tank be?
2. how many chambers will my sub tank have?
3. how many baffles will my sub tank have?
4. how much flow rate will my new tank must have?
5. what are my required lighting?

and as for now these are only my questions,
please do answer back thank you very much

 

read this mateMelevsreef.com | Acrylic Sumps & Refugiums;D
Ive seen this link featured here on 3reef abit and i found it interesting ..
Even though i dont have a sump on my tank , i found it easy to understand