K. B. wrote:a perforated pipe down the center of the barrel may work to keep the substrate from running too low on O2 (similar to aerating a compost pile). A polyethylene tube (sleeve) ~1' thick filled with pre-sterilized coffee grounds may be better than a barrel. Hanging sleeves about 8' long from the ceiling are pretty cool
jacque greenleaf wrote:Hmmm. This brings up something I've been mentally kicking around. I've noticed that most teks direct you to grow and fruit mushrooms on a homogeneous substrate. If you had a pound or so of vigorously running spawn of an aggressive nature like oysters, couldn't you mix substrates in your next step up? In this instance, I am wondering about mixing corrugated cardboard, coffee grounds and straw. Straw and cardboard would help the grounds stay aerated.