Build my new reef tank

[Chris Nias]

My planing to build my new reef tank with dimension 72" long 30" wide and 24" tall.
I built using 1/2" glass thickness, locked system. But i don't want use centre brace. Is it possible?
How wide do I need the side brace? Is it enough for one layer or should it be doubles?

 

[lapin]

I would euro brace it at the top and the bottom.

 

[Chris Nias]

Yes, i mean if i use euro brace at the top, what is good euro brace size? Do I still need a center brace? Because I don't like it, it can lower the PAR value of the lights.