I'm wanting to use black diamond blasting sand as a cap for organic garden soil in my 16 gallon bowfront. I was wondering if the is a specific grit size I need to get (xsmall, small, medium, large, xlarge are the choices), and if I should rinse it first.
Thanks for the replies. Unfortunately, the only store near me that carries it, only carries 30/50 (fine grit), and I already bought a bag. I'll of course be rinsing it based on the recommendations here, I just hope that it doesn't rinse into nothing because of the finer grit.
Warning though - this stuff will clog your drains so tight it'll take a snake to clear it, so don't let more than a few grains down there!
I just used a big salad bowl to rinse 150 lbs of mine in the kitchen sink. It didn't take all that long, and you can just point the water stream right into it and let the water overflow the bowl and all the crud spills over the side with it. Move it around (if I had a sprayer I would use that) a bit and next....