Step 4: Fill the jars
Leave about 1/2 inch of space between the substrate and the top of the jar. I just filled my jars up to the threading for the lid.
Be sure to wipe up any moisture/substrate on the 1/2" inside and outside the jar.
Fill the rest of the jar with dry vermiculite. This is to make a barrier between the substrate and contaminants in the air.
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