Foam under a SeaStar tank?

[Madreefer]

Originally Posted by Borderjumper

IMO it's so rigid that once the tank edge settles IN to the foam the whole middle of the tank has an upward force pushing against it.

Makes perfect sense to me. I agree. If tanks were designed to have any foam under the tank than why do they not come that way? Or why do they not sell the correct sized precut peices? Good money maker especially for odd shaped tanks? Someone posted about glass bowing out. Maybe there is supposed to a little bit of bowing out underneath.