I have done bare bottom with egg crate and live sands on many tanks. Mine was white egg crate and it turned purple. Love the looks of the purple colors. Bad thing about bare bottom is all the debris are on the bottom. Not everything can clean the corners inside the egg crate. Eventually they start breaking where the rocks sit on top of. I have had bare bottom for over a year then upgraded from 40 to 75 drilled. My wife wants sand bed. So HAPPY WIFE = HAPPY LIFE! Another con is, wife doesn't like bare bottom and she yells at me a lot about adding sands!