Jim, The description of your pumice seems odd. It should not be that small, but it seems that Dry Stall will package various sizes. You may have gotten a bag that was less than ideal. Luckily, we have a wiki entry that shows the pumice, along with many other growing media. The page was greatly improved by Gastil's additions. http://pacificbulbsociety.org/pbswiki/index.php/… Hope that helps, Nhu On Tue, Jul 2, 2013 at 5:12 PM, Jim McKenney <email@example.com> wrote: > When the rest of you talk about dust, fines and small stuff, are you talking about particles smaller than the ones I've described? > Did I pay $20 for a bag of something the rest of you sift out and throw away?