AHHHH! I am new here and have quickly learned that this is a really sticky subject. Some people who use sand only use washed playsand that has been sifted through a screen to remove any pebbles. Other non-sand users use shelf liner, paper towels, and newspaper. There seems to be a big controversy on this subject, but I hope you can get a little from EVERYONE'S advice. There are soo many knowledgable people on here that have many great and different ideas.
Hope you find what works best for you and your dragon.
lol...I always wince now when I see a post on substrate. 
joi