Weird stuff on seedling site

I just planted 7 mazar autos 2 days ago after a 24 hour soak. I watered this stuff (Miracle gro seed starting soil) and put under heat register. I find this weblike silver silk like material on top of 1 of the sites. I think ive seen it before and cleared it out. If its beneficial i want to leave it

That looks like some type of fungus to me.. I doubt it's beneficial.

I'll clear it out then thanks!

If I didn't know better id swear that was PM.

But PM doesn't live in soil.