Quotes taken from this forum hope that helps:
http://www.3reef.com/forums/sand/lo...hawaiian-black-sand-96441-2.html#.Utc7Uvuoeeo
OK, so these are the pros and cons I have learned so far regarding black sand.
Cons:
Black shows the debris and detritus that accumulate over time. I don't like the salt & pepper look very much. (Thanks & Karma to the members who added the pic's!!)
Black retains heat, I live in Southwest Florida and heat is an issue for me.
Black does not reflect light very well. I would get more bang for my MH buck with white sand, also the underside of some of the corals may not look as good as they would with white sand.
Black sand may contain iron. I heard a horror story about a guy who destroyed his tank because the sand kept getting stuck in his mag-float and scratched the glass, also the potential of the sand getting in powerhead magnets.
Black sand is a bit coarser, it may agitate sand sifters.
Pros:
It looks very very sexy!!!!!
It looks very very sexy!!!!
It looks very very sexy!!!!
Soooooo, I keep thinking of this comparison. I have seen guys who prefer the very very sexy girl over the far more functional one, even after being forewarned of all the facts. (not that I have ever made that mistake) and in the end regret it. The blind, short term lust
for beauty overweighed the more logical choice.