Black Sand Question?

[greenmako]

I cant remember all the details, but I think its crushed obsidian or something similar. The result is it is very sharp and horrible for burrowing creatures and sand sifters (snails and gobies etc).
-christina

[aprilmayjune]

Erik I think you are right about the heat part. Also the black sand is less reflective of the lighting so if you have a reef tank the underneaths of your corals won't be getting as much light as with white sand. At least that is what I've been told before.

[ismvel]

I cant remember all the details, but I think its crushed obsidian or something similar. The result is it is very sharp and horrible for burrowing creatures and sand sifters (snails and gobies etc).
-christina

You are right, although I don't know the details...it is small and sharp looking. I do have burrowing snails (nassarius) and a fancy nassarius, that get under there...they are probably screaming an cursing me for having that stuff...