I miss the look of a thin sand bed. I had 10lbs in a 20long, but started removing it as it was too thick for my taste. I recently moved and upgraded to a 40b, bare bottom. I love how I can control where the detritus settles, love that the snails can eat from it, love that I can crank my wave makers. If I didnt have a sump full of rocks I wouldnt of done it. It also promotes a different type of bacteria growth than a sand bed does. It just fits my style of reefing more than a sand bed did.Explain please! Just interested.