If someone likes having a sandbed with all the critters than they should have one! Can have great tanks either way.
Personally I much prefer no sand. Looks more natural to me - the big acro reefs are mostly rock/coral bottom not sand. The biggest issue was that when I kept sand when I tore down the tanks it was so nasty. Had plenty of cuc, the sand was just filthy where I couldn't clean the sand under coral colonies. I would really be hard pressed to have sand again unless I was going for a specific environment.
I'm debating this myself and just met someone for the first time that had a bare bottom tank. I didn't really even notice at first because the tank had been up long enough to have beautiful coralline covering the bottom. One of the most beautiful tanks I've ever seen in person and looks meticulous while natural. My only concern is that i have never really had any luck with coralline and wouldn't want a diatom covered bottom that needs to be scrubbed all the time. Or a bare glass bottom would get old after a while I'd presume. Really just giving it some thought and great information here. I'll most likely try it in my new Red Sea Reefer 450 Build.


