calcium sand
A type of reptile substrate made out of 100% calcium carbonate. Known for it's ability to cause severe impaction, calcium sand is hated by most reptile enthusiasts.
I uSeD cAlCiUm SaNd WiTh My LeOpArD gEcKo AnD hE lIvEd HiS fUlL 3 YeAr LiFeSpAn!!!