Oyster grow from mushroom chunk

Here is my oyster grow from a mushroom chunk experimental update -

The jar all the way on the right had mold come up right where the mushroom is, but the oyster mycelium is outcompeting it. The jar on the far left has a cardboard filter on top of the brown rice flour/vermiculite nutritive media and looks clean. The middle jar has no filter, but looks like it was clean going onto brown rice flour/vermiculite. The right side jar has no filter, but sawdust mixed into the brown rice flour/vermiculite. Not seen to have growth yet is a fourth jar that I started a week or so later than these that has an sawdust filter then BRF/verm. I don't know how many species this uber easy tek will work with to create new spawn, but for oysters, it seems like a win.

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