Personally I prefer the look of sand to complete the look of a tank. Although I've seen some stellar bare bottom tanks too. I have had deep sand beds and would never have one of those again. They were a pain to keep clean and maintain. Currently I have a light dusting of sand about one half to 1" of sand as my sandbed. It's just there for aesthetics. It's easy to rake and keep clean and doesn't make as big of a mess whenever I need to replace it, which I do every 2 years or so. The powerheads do tend to push the sand bare in spots, but that doesn't really bother me. I just rake the sand back to cover the bare spot (if I can be bothered). My wrasses do stir up the sand whenever they go to bed or are just bored, but the sand cloud is only temporary so it doesn't really bother me.
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