Powdery mildew?

ONbuds

New Member
Hi everyone, this is my second indoor grow and I’m running a humidifier right now. I’m not sure if this is powdery mildew on my fan blades or if it’s minerals from the humidifier, I’m worried because they just went into the tent about 2 weeks ago. If anyone knows for sure please let me know. Thanks
 

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Actinolite

Member
While it's possible to have spores "stuck" on your fan and spread around that way, they won't germinate and spread like they do on plants, PM needs living plant matter to actually be active on
 
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