I think the key with sand is you need critters to move it around for you such as Nassarius, my ceriths also burrow in the sand and come out at night. My other crew is a pair of tiger watchman gobies and they keep the sand turned over and pristine, although they can get a tad carried away building piles. But they are interesting to watch.
But it totally depends as every tank is different, and what works for one might not work for someone else.
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