if i were to go with a black substrate,i would use the fluorite black.but i would use the small gravel rather than the sand.and fluorite does have a black sand now.i like the look of sand;but i hate the instability of it.every time something moves it sends up a cloud...lol..
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if we ignore nature;maybe it will go away
10 gallon..nothing but air
10 gallon...just more air
10 gallon...stale air
just don't ask about the rest
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