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Dextrose 100% additive for fungal media
This is pure carbohydrate powder, and mushroom mycelium loves this stuff.
Dextrose powder can be added to agar (or agar-based mix) and used to create culture plates on which mycelium can grow.
It can also be used for making liquid cultures too.
Typically, 20 grams of this dextrose powder is used per 1000ml of water.