Help making a sump

[Xbreakxitxdownx]

I'm planning on making a 45" L x 20" w x 20" H what thickness of acrylic do I need? Also do i need it euro braced?

 

[cromag27]

1/2" with euro, 1" rimless.

 

[Pepcrylic]

Depends on how many baffels you use and were they are placed