Egg Crate Under Rockwork ?

[hillbillyreefer]

I've got three tanks with, one without. One with has only about 1" of sand and sometimes the egg crate is exposed by the flow, looks terrible. One has about 3" of sand I've never seen the egg crate in the tank, I like it. One just has the rock sitting in the EC no sand. It doesn't look very good, I thought it would cover over in coraline, but hasn't in 2 years. It is also a pain to syphon detritus out of at water change time. The BB is great for syphoning at water change time, out of the two without sand I like it the best.

A long story short, if you are going BB don't use egg crate, if your going to use sand then use it, IMHO.