Jeff zone 8 N.C.

What kind of screening are you using? Not only does my area not have suitable pre-screened coarse sand I have not found any screens except typical window screens for insects and then screens jump up to 1/4 mesh. Would certainly be willing to hunt down the correct screen size. We do have the same sand as in your posted pic but it could be from a different regional source. Thanks for that tip. I will certainly try it if I can find a way to process the sand.