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Black sand substrate - General Discussion - C.A.R.E.
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Can I Use Black Diamond Blasting Sand in an Aquarium?
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Amazon.com: Black Diamond Blasting Abrasive [Misc.] : Tools & Home Improvement
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PSA: Black diamond blasting sand works for a planted tank substrate and well worth it if you don't want to break the bank on a aquascape in a large tank. : r/Aquariums
Close up photo of medium grit black diamond blasting sand. Taken in sunlight to show coloration of the sand. : r/walstad