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Amazon.com : Outward Creations 40 Pack, Mushroom Grow and Spawn Bags - Extra Thick Polypropylene Material, Tear Resistant - Size 4" X 3.5" X 13" with 0.2 Micron Filter Breathable - Spawn
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A pictorial to use spawn bags to grow pounds of mushrooms! No HEPA required. - Mushroom Cultivation - Shroomery Message Board
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