Wow is this stuff dusty !
I finally got my tank filled today and rinsing that MoonSand is a bugger.
This stuff makes playsand look like boulders... super , super , super fine granules.
Tim if it has that gray look to it you did not rinse it well enough...that dust even stained my bucket walls its so fine !
I would be scared to disturb this stuff without some SERIOUS rinsing...
However it looks beautiful !