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Amazon.com: Black Diamond Abrasive Blast Media, Coal Slag, Coarse Grade, 10/40 Mesh Size (5 LBS) : Tools & Home Improvement
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Amazon.com: BLACK BEAUTY® Abrasive Blast Media Extra Fine Abrasive 30/60 Mesh Size for use in Sandblast Cabinet - 10 LBS : Tools & Home Improvement
![Is black diamond blasting sand 30-60 grit any good as substrate? It says “fine” and everyone recommends “medium” but this is the only one I've found around here : r/Aquariums Is black diamond blasting sand 30-60 grit any good as substrate? It says “fine” and everyone recommends “medium” but this is the only one I've found around here : r/Aquariums](https://i.redd.it/h8srk39ag3s81.jpg)