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Is blasting sand safe for substrate?


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Looking into substrate alternatives when I thought of blasting sand, as it comes in 50lbs bags for about $12. But considering what the sand is used for, will it bother any fins or gills? Specifically Black Diamond blasting sand.

I plan on putting a couple fancy goldfish and maybe some Corydoras into a new tank and want no issues.

Anyone use this before?

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It would seem safe. Black Diamond Blasting Sand is not really 'sand', it is coal slag. Here is what that means:

The tank with Black Diamond Blasting Sand is labeled 'Dirt' and is the middle aquarium:


The fish in this tank seem as happy and perky as the fish in 'Nerm' and 'Eco'.

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