Black Diamond blasting Sand???

I had a couple of people swear to me it works well and fine for plant roots. I've never seen it so can't say if its smooth or sharp. Back to that Corydoras thing.
Otherwise, it looks great too.

Just giving an update on the Black Diamond Sand as a substrate. I really like it. I love the way it looks. It’s beautiful! My Corys are having no issues with it. I have had this tank set up for about 5 weeks, and everyone is doing great.

It does look very nice