I planted colonized grain in the CVG substrate about 6 weeks ago. JMF strain. This is my best tray and the rest of them are about half as colonized. Temperature has been 75 to 80F in the tent. But the propagation seems to have stopped.

Not sure what to do next.

These are all closed takeout trays, is it possible that CO2 pooling is stopping mycelium propagation? I don't have the humidifier turned on so I could turn on the humidifier and open them up to a little bit of air exchange. But I thought that CO2 didn't stop mycelium propagation.

The last time I did a grow in this grow tent I was using larger trays that had micropore tape over the side ports. but there was masking tape over the top of that during propagation cycle, so there wasn't any air exchange. But there was about 4 inches of space at the top.