Foam under a SeaStar tank?

[Borderjumper]

Yeah the glass was defiantly sitting down onto the foam.. The edge of the tank had compacted down into the foam at least an 1/8 of an inch, putting the glass right on the foam,that's why the water didn't just gush..the foam was exerting pressure kind of holding it together. If a tank is not designed to have the glass carry any weight, and it's in contact with rigid foam.. It's carrying weight. If it woild have been soft foam.. Then I would think it would have just kinda of supported the glass.. Hard foam has no give.. So the glass was actually being pressed down on it..

Foam and the pink insulation foam may be two different things in this application?? Think of the foam floaties that corals come on.. It's hard and doesn't have much give.