High Tide Aquatics

Carpenters wrasse

IIRC fairy and flashers don't need it, but, it's a been a while since I've even thought about them so I may be wrong :D
 
I just went and looked at Marine Fishes By: Scott W. Michael and it did not say anything about a needing a deep sand bed. Also remember that fish can vary greatly between species like I know a person who has a clown fish that eats coral.
 
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