Indoor growing of Lion's Mane

I grow a lot indoors, being I forget to check stuff if it's outside.

I have some Lion's mane growing a humidity controlled tent, but I'm getting a lot of feathery Lion's mane fruiting, without the substantial fruiting body. Doesn't this sound like the CO2 is too high? This is much too much fruiting mass to be a contaminating fungus.

Thanks

Do you have a fan for air exchange?

No air exchange fan, but I manually air it out once or twice a day. Not counting the air that comes in with the humidifier.

Sounds like you need more air exchange for starters, and yes it is probably too much CO2.

Thanks!!