ok, in a never ending quest to be cheap I was searching around for alternatives to southdown.
actually, the southdown we have here is terribly contaminated and all discolored looking.
so I was a K
-Mart and noticed they have bags of something called Rock Plus brand limestone screening.
The consistancy looked a LOT like southdown, being of a medium, fine and dust-like sized grains
it was 2.22 for a 50lb bag.
the best part was it wasn't contaminated like southdown - the sand looked dirty, but did not contain large patches of colored contaminates like the southdown.