First ever grow need help :(
My first ever mushroom grow I have a couple tubs but this is my biggest and oldest one, still haven't harvested it and I made it on 3/26/26, I try to air them and humidify via humidifier with a hose in the tub and recently started misting the tubs with a spray bottle which i think is better however i still use the humidifier a little just in case. all of my tubs have small outward facing fans and poly fil holes, this large one has one outward fan on the opposite corner from an inward facing fan that blows through poly fil before entering the tub. my other tubs are shoebox size and do much better, one on its third flush and the other is on its second, i'll add pictures of those as well but recently the mushrooms in the big tub all started bruising and i noticed cobweb looking stuff on the cake that leaves no residue on a qtip swab. i've heard it could either be mycelium reacting to too much co2 and bruising from the lack of oxygen or it could be they're dying and it's cobweb mold but i was hoping someone with more experience here could help me figure it out