OK, yesterday, when I got my Leopard Gecko, the pet store guy asked me what I was going to keep it in, feed it and use as substrate, etc. He didn't like any of my answers. I told him that I was going to use paper towel and he basically wouldn't let me leave the store without getting the T-Rex brand Calci-Sand.
I read that sand as a substrate is NG, but this stuff is different. It's not "real" sand. You could read about it on the Petco site. Also, from what I read, sand is NG for young'uns but ok for adults. My Gecko is 8" so I'm assuming it's an adult.
Is it ok/good to use or should I stick to paper towel?

