Heather is that the same substrate that is sometimes called "lab chips" I think???? I remember seeing something at a breeders that I think I remember being called "labratory" chips or something to that effect.
I currently use paper on the BP's, aspen or an aspen/cypress mulch combo for the colubrid and the boa's. While I like paper for it's easy of cleaning I don't care for how it has no real absorption so if the snake spills it's dish 2 seconds after I close the tub, it's sitting in a puddle basically. Paper just doesn't wick anything away temporarily. I've been searching for other options before I return to aspen most likely (snake room floor is hardwood and there's feeders in there, so I'm always sweeping anyways).