I am a first time grower and I have a sealed grow room with 36 plants from seedling to 1 week away from harvest. I have only seen a few fungus gnats a couple months ago, but nothing else and nothing since. Today on one of my plants I had an odd looking leaf. I zoomed in with my camera and my bud camera and this is what I saw. It never moved and I don’t see any legs on it.
Is this anything and what could have caused this. This is the only leaf that looked like this.