styrofoam under tank.

[Sir Crabby]

I have a 335 gal that is 6'x3'x30" and I built it inwall with 2" styrofoam underneath. MY question is the 2" to much or will it be Ok. My LFS has all 2" under theirs and others have told me 2".

 

[Sir Crabby]

also forgot to say it is acrylic.