Wow! Amazing tanks guys! This really makes it possible to have an interesting aquascape even if you don't have very much width (doesn't take up as much space). I might now be able to hide my overflows and have a cool aquscape in my 135g (72"x18"x24", LxWxH), where the shallow width has always prevented me from doing anything interesting.
Just 3 questions, and sorry if this has already been answered.
-Does the foam ever become alive and harbor beneficial filtering bacteria if seeded with LR or starter cultures?
-Also, would my 11.2g (18"x18"x8") be OK if I used only the dry rock/foam for aquascaping and seeded it? Or would I need a sump or something to hold extra real LR to act as the filter?
-Final question: do you have to secure the eggcrate/foam/rock background to the tank with silicone, or can it be free standing if it has enough horizontal support?
Thank you very much for your time and creativity in coming up with this awesome idea!