Eggcrate Under Sand ?

[Aquattro]

Originally Posted by DiverDude

So do you put the rocks on the bare glass and then add sand or put sand and lay the rock on the sand ?

I figure the latter would remove the need for the eggcrate in the first place but I'm concerned that sand dwellers could undermine the rock structures and cause collapses...

Put it on the glass. This prevents anything from digging under it and toppling your rock scape. I would actually put a bit of sand, add the rock, twist it into the sand a bit so that it's touching glass, then add the rest of the sand.

The discussion linked above, if it's the one I'm thinking of, will give lots of input. But rock won't break glass just by sitting on it.