My stock mycelium is showing some growth into the new cardboard, but it is painfully slow. It could simply be that our basement is rather cool.
The beech mycelium is all nice and fuzzy, but does not appear to be growing into the coffee grounds as yet. There is very wet layer of coffee grounds in the bottom of each bag and that is going to be an issue. It is too wet for the mycelium to colonize and may already be heavily contaiminated. I have considered taking a syringe of 3% hydrogen peroxide and injecting the layer with it. This will mix with the water and hopefully kill of any contaminants. Later, I can poke holes in the bottom of the bags and drain the liquid. I am still thinking.
Thoughts on the issue are welcome.