In my display tank I have a bare bottom and I like it. Nothing really unnatural about it, live rock and corals all over with coraline all over the glass. Really good for siphoning detritus off the bottom and lots of water flow with no sand blowing issues. I think it works well, just looks different (flame suit on)...looks better.
I do have a deep sand bed in my sump it works real well there and have "yet" to have any sand bed issues.
Dave
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