Was at a reptile show last month and actually saw some of the new fine substrate they are coming out with. Much smaller "grain" than the current stuff so if you want to have something fine for say bioactive or burrowers like rosy boas, see if they are now selling it. I really should have picked up a bag when I was there
All I know is Dante has never been more mellow since getting him on this stuff and I have not had one issue with him being dead so it is "so far so good".