Hey Griz, you can get it from post
reptile supply stores, there are 2 brands Kaytee and Zoomed. Kaytee is slightly more COURSE (i deliberately use the wrong spelling as i get censored if i put A next to the rse) but it's much of a muchness.
It is fairly expensive, a large bag will cost you anywhere between $35-50 depending on where you purchase it from. A large bag would just do a 5ft by 2ft by 2ft enclosure. With spot cleaning that would need to be totally replaced in in 2-3 months at the maximum.
I use it for hatchy's a fair bit but it's a bit pricey for whole tanks. I've started to use steam sterilised red-cypress mulch much like what Greg Maxwell uses for his greens. It's not off the shelf I get it made up.
Cheers
