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Growing Substrates
Displaying 1 to 5 (of 8 products)
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![Crushed Oyster Shell Flour - 3lbs Crushed Oyster Shell Flour - 3lbs](images/crushed_oyster_shell.jpg) |
Crushed Oyster Shell Flour. A natural source of calcium carbonate. Used to raise the pH from acidic to base. Primarily used in casings to help... |
$4.95 $3.95 Save: 20% off
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![Diatomaceous Earth - Horticultural Grade - 1lb Diatomaceous Earth - Horticultural Grade - 1lb](images/DE_Diatom.jpg) |
Diatomaceous Earth - Horticultural Grade - 1lb Used as a non-toxic insecticide, due to its physico-sorptive properties. The fine powder absorbs... |
$1.99 $1.79 Save: 10% off
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![Gypsum - Calcium Sulfate Pharmaceutical Grade Food Grade - 1 lb Gypsum - Calcium Sulfate Pharmaceutical Grade Food Grade - 1 lb](images/gypsum.jpg) |
Very high quality Gypsum, also known as Calcium Sulfate, or CaSO4. pharmaceutical grade and food grade powder. Highly used in the mushroom industry... |
$4.95 $2.45 Save: 51% off
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![Horticultural Perlite - 8 Dry Quarts : 2 Gallons Horticultural Perlite - 8 Dry Quarts : 2 Gallons](images/perlite.jpg) |
White perlite granules are the result of the expansion of combined water vaporizing in the crude mineral and forming enclosed air pockets. Because of... |
$7.95 $6.95 Save: 13% off
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![Horticultural Vermiculite - 8 Dry Quarts : 2 Gallons Horticultural Vermiculite - 8 Dry Quarts : 2 Gallons](images/vermiculite.jpg) |
When processed in special furnaces, the mineral ex-foliates (or expands) in the the accordion-like layered particles familiar to many as a part of... |
$7.95 $6.95 Save: 13% off
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Displaying 1 to 5 (of 8 products)
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