Just personal preference here that I hate bare bottom tanks and could never imagine running one. I see a lot of people with discuss tanks do this. It just doesn't look or feel right to me.
I always mention to people that with a sand bed you must include something that will sift it up to prevent the build up of toxic gasses. In my 90Gallon freshwater I have a horseface loach and in my SW setup I have a sleeper goby. (considering a sand sifting star but I know how difficult they are to keep)
So really it comes down to you, both ways are fine and BB is much easier and cleaner but it all comes down to you.
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