Shroomok: I don't see problems with shrooms here. But I'm worried about mycelium (the start of overlay). Mycelium dry a little bit. High humidity and water drops on mycelium that dry out usually create a matted or crust-like mycelium. As a result, overlay. Check your fruiting conditions! FAE and Humidity should be in balance Dry myc + high humidity or water drops on myc + high CO2 = overlay Lack of FAE + high humidity or water drops on myc = overlay high temperature + low RH + high CO2 = overlay low RH + high CO2 = overlay dry casing layer + high CO2 = overlay dry casing layer + low RH + high CO2 = overlay any of parameters + genetic changes = stroma Find your case
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