HH Morant Posted August 6, 2021 Share Posted August 6, 2021 I have decided to use coal slag blasting media as a substrate. It comes in different particle sizes. I bought a 50 pound bag of medium Black Diamond. On the bottom of the bag three different sizes (1240, 1630, and 2040) are marked, so I assume the "medium" includes all three of these sizes. The bag indicates that there is one size that is coarser, 1040. I think I would like larger size particles than are in the "medium" bag. If anyone has a preference as to particle size for coal slag substrate, I would appreciate your advice and the reasons you prefer your choice. I got the medium Black Diamond at Tractor Supply, but they tell me they do not sell any larger particle size. So if I wanted a coarser (larger particle size) coal slag blasting sand, where could I buy it? I am in Houston, Texas. Thanks. Link to comment Share on other sites More sharing options...
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