blu_devl_06;458048 wrote: If you put the rocks on the glass, then add the sand you shouldn't have that problem. Said problem NORMALLY occurs if you put the sand in first, then build rocks on top......right? I have never put eggcrate under my rocks, it kind of defeats the purpose of having sand. Where will the wrasses go when they get scared, where will they sleep? Will the nassarius snails be able to do their job? I just don't like the idea of putting eggcrate in the botom of a tank....