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Thread: Black Diamond Blasting Sand, safe or no?

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    Axelrod12's Avatar
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    Black Diamond Blasting Sand, safe or no?

    I have a 50lb bag of black diamond blasting sand around. I think I bought it initially intending to use it as an aquarium substrate.

    I was wondering if it would be safe to use in a cp potting mix? It is primarily coal slag.

    Here is a link to the MSDS:
    http://www.ati-blackdiamond.com/prod...ds-sheets.html

    Other than material my only other concern would be whether the sand would damage roots. For its intended use I believe it is designed to be somewhat sharp?

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    corky's Avatar
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    I would plant a sacrificial sundew

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    Axelrod12's Avatar
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    Quote Originally Posted by corky View Post
    I would plant a sacrificial sundew
    Haha this can be done, maybe I'll pot up a D. capensis and possibly a spare Sarracenia division to see how they do through the season. Unless of course someone already has the answer still.
    Last edited by Axelrod12; 04-25-2015 at 08:34 AM.

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    Hello, I must be going... Not a Number's Avatar
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    Claims are made that coal slag is an inert material. Give it the acid (vinegar) test and let it sit for a day or so to see if there is any reaction.
    Grand Hotel... always the same. People come, people go. Nothing ever happens.

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    Axelrod12's Avatar
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    Quote Originally Posted by Not a Number View Post
    Claims are made that coal slag is an inert material. Give it the acid (vinegar) test and let it sit for a day or so to see if there is any reaction.
    It's believed to be inert by many people who use it as an aquarium substrate. I will do the vinegar test though.

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    Cthulhu138's Avatar
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    Steve from the NECPS used this in his bog. Seems to be just fine.

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    Axelrod12's Avatar
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    Quote Originally Posted by Cthulhu138 View Post
    Steve from the NECPS used this in his bog. Seems to be just fine.
    That sounds pretty good to me, I'll definitely try it out for some Sarracenia then, maybe a mini bog.

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    BS Bulldozer SubRosa's Avatar
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    Quote Originally Posted by Not a Number View Post
    Claims are made that coal slag is an inert material. Give it the acid (vinegar) test and let it sit for a day or so to see if there is any reaction.
    If coal slag is chemically reactive, which I honestly don't know, it would likely be acidic already and wouldn't react with an acid. The fizz test is strictly to determine if a mineral sample is limestone. I think a more informative test would be to add some of the material to some distilled or ro water and let it soak a day. Then test the pH of the water.
    Last edited by SubRosa; 04-25-2015 at 11:28 AM.
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