Other than misidentifying the egg crate :-) , yes
you can put the egg crate down, and put the live
rock on top of that, though I'm not a big fan of
that method. But even still, if you do that you
still will have sand above the bottom of the base
rock if you want any kind of depth of sand in the
tank, unless you want to stack egg crate on top of
egg crate.

Wayne Sallee
Wayne's Pets


KurtG wrote on 4/22/2007 8:14 AM:
Wayne Sallee wrote:
Only place the live rock on top of the sand if you only have a few
pieces of live rock. If you are going to stack the rock, then put base
rock on the glass, and put your sand around that, and then stack your
live rock on top of the base rock. Don't build your house on the
shifting sand.

I've heard of people putting egg crate on the bottom/back and then
stacking rock on that. The advantage is that you can glue the rock to
the egg crate, but still be able to remove it at a later point.

I've always thought egg crate was the bumpy foam pads that are used for
packaging (or for sleeping on while camping) that resembles both the
size and shape of egg crates. But apparently, it's also the name for
the translucent plastic sheets with small bumps used for fluorescent or
commercial light fixtures that can be found at lowe's and home depot in
the lighting section.

Just an idea if you building a large landscape and need it to be stable.

btw, the reason sand shifts is because of all the shrimps, fish, etc
that burrow in the sand under the rock to build caves. My blue damsels
have been very busy lately. And, my clownfish was also building a nest.