Alum powder is typically found in the spice department of supermarkets, as well as most garden centers. But what exactly is it and how is it employed in gardens? You can learn more about alum uses in
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The History and Uses of Alum in Britain • Eco-Friendly, Plastic-Free Products, UK
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Alum may be purchased in small blocks. The best way to use it is to cut a small piece and then powder it to a fine consistency. Alum stone is a
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How to Use Alum Flocculant in Pools - In The Swim Pool Blog
Alum Powder Can Help Keep Your Cut Hydrangeas Fresh For Weeks