I had a DSB for several years and it became a big algae factory. The kind that carpets everything in the tank. Would never do one again. The theory of restocking sandbed fauna doesn't make sense to me. If they are constantly dying off - where are the nutrients going?
I also think that BB is the best for maintenance but I prefer the looks of some sand. I went with a thin layer of crushed coral that I vacuum with a syphon during water changes.
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