Okay, off-topic (sort of), but about aquascaping with ceramics or LR:
Some tanks I've seen recently seem to have the rock all the way up against the back glass. And I see these ceramic pieces called *back walls*. Seems like there would be a problem with weight against the back glass.
I'd love to kind of stair-step my rock from the front of my tank to the back, but I've always been worried about rocks leaned or stacked against the back glass compromising the strength of the aquarium structure.
But, then again, I guess an unsupported rock suddenly tumbling from the top middle and hitting the back glass could result in an even bigger catastrophe (i.e. armynavywife's situation).
So........... all the beautiful tanks I'm seeing in the members' gallery which seem to have the rocks going up and back against the glass. No problem? Or is that an optical illusion?