White fuzz on soil, beneficial or harmful?

Started my new grow in my new home finally (not completely unpacked, but getting there)
And noticed some white fuzz on my autoflower’s topsoil.

Should I be worried or is this a sign of good soil? I had a small cup to dome over and create a little more humidity for 2 is days, but removed for an hour here and there to breath. (for a few days it was around 40% and I couldn’t locate my humidifier)

some info on the grow:
- medium is blue sky Organics myco blend
- Amended with Gaia green 444,284
- Around 72F, and 50% Rh

Strains -
Green Crack Fem
Bubba’s Gift Fem
Speed Bud Autoflower x2

Looks like PM to me.

Edit: I was wrong lol

Green_Alchemist said:

Started my new grow in my new home finally (not completely unpacked, but getting there)
And noticed some white fuzz on my autoflower’s topsoil.

Should I be worried or is this a sign of good soil? I had a small cup to dome over and create a little more humidity for 2 is days, but removed for an hour here and there to breath. (for a few days it was around 40% and I couldn’t locate my humidifier)

some info on the grow:
- medium is blue sky Organics myco blend
- Amended with Gaia green 444,284
- Around 72F, and 50% Rh

Strains -
Green Crack Fem
Bubba’s Gift Fem
Speed Bud Autoflower x2

View attachment 4909818

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No worries. It's mycelium, a beneficial fungi.

Mycorrhizal fungus. Beneficial