So I have been searching for sand, oyster shell, chicken grit.....
Since I don't live in the Midwest, chicken grit is difficult (not impossible) to find in large (50 - 100# bags) anywhere nearby.
Due to health concerns, HD can no longer sell silica-based sandblasting media.
I came across a new sandblasting media made from coal slag:
http://www.tractorsupply.com/tsc/pro...s?cm_vc=-10005
Anyone have any experience with this?
Otherwise I'm heading to buy some 1/16 - 1/32" poultry grit in 50# bags for $13/bag.
I was thinking of adding ~ 10-20 pounds of oyster shell to each 50# of grit for the pH-balancing qualities.
Thanks in advance,
-R