black sand

+1 Fragenstein,
That's the main reason I went with the 40/60 mix with the white sand. 40white/60black

 

One thing about the Carisea "Tahitian Moon", is it's sharp. Not recommended for soft bellied fish or burrowers. And you also need to be extra careful cleaning as it can scratch glass fairly easy.

 

I have black sand and I think its pretty cool. This is my first tank so i really don't have experience with other substrate but i do believe it looks pretty nice. Its a 80 gal and ill try and gets some better pics posted cause the one i have now is with my cell phone. I got to resize the other ones that look better from the camera. Go with what you feel looks good for your own taste, keep searching for comments! good luck

Now have pics up in my album profile so feel free to check it out

 

I was initially looking at using black sand in my tank. I don't think it necessarily collects more detritus but the detritus shows up better against the color. It could make your tank constantly look dirty and that's why I went with white. Also, black will not reflect the light as well as a lighter color or the salt and pepper mix. If lighting is a concern for you it might be something to think about. Good luck whatever you decide.

 

I was going to say the same exact thing... particularly if you're using MH, the glitter lines are amplified back off of white sand to the underside of corals. Just image being in a room with one window on a sunny day... imagine white walls in the room, then imagine black walls. Not life/death, but it can be a significant consideration, particularly as jbaker said, if you're trying to squeeze every drop of PAR you can out of your lighting system.

I can't deny, however, that black sand creates a stunning effect... particularly mated with vibrant colored coral... check this out!