Styrofoam sheet question - ASAP

[Wulfonce]

Im about to run out and get a sheet of styrofoam to put under my 90. Should I go for the stuff thats mildly squishy or the rigid stuff? I did the rough math and the foam has to be able to hold up at least 11psi of weight without squishing itself flat.

Need an answer asap.

 

[uncwnells]

i would say the rigid

 

[dogofwar]

I use the rigid.

 

[Wulfonce]

Well I picked up a 4'x8' piece of 1" thick rigid styrofoam from Rona for $6.22 CND. I have no idea what im going to do with the leftovers. Future tanks I guess lol.

 

[uncwnells]

Im sure something wil come up!