Originally Posted by mr_X
I think black beds look good initially, but you can really see any dirt on the sand. Also, it's non reflective, unlike white sand beds, so you'll lose any extra light bouncing up under rock overhangs.
X has a very good point. Light is precious in some systems. Black sand is almost always volcanic by nature, meaning it can contain elements beyond selenium. But it's been used enough, especially in FW
that I wouldn't be too concerned in using it.
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