Eggcrate for rock

[Doug]

So I ask, reading Brad saying that was a stupid thing he did.

Why is that?

Cant it be cut where the sand may expose it?

Does it not support the rock better and keep it from sliding?

If its stays covered in sand, whats the difference?

Enquiring minds wish to know. I have never done it but have it in my tank now. Of course nothing else is on there so no biggy.

Tanks..