Apologies in advance, I'm not familar with technical terms yet.
I harvested my first (huge) flush in a bulk grow 12"x18" bin and am ready to start the second.
1) After harvesting all of the mushrooms I am left with substrate (which is dark/dirt) and white mushroom material that was the base of the mushroom patches. Do I pull out the white material (which comes up with a bit of substrate and mycelium on the bottom), effectively returning the top of the bin to all substrate, or do I leave it there?
2) How and how long do I dunk my 12x18x3" bulk grow substrate bed?