I'm planning on getting a Mali Uromastyx, and want the enclosure to be as closely replicate to the wild as possible. I've read that in the wild they are used to a sand/clay type soil, and so wish to put that in my tank. What type of sand and soil should be used, and where can I get it? Also, what is the ratio of sand to soil that would be ideal?

Thanks,

Dragonbeards