What could these spots be?

  • Thread starter Musicalrx
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Musicalrx

Musicalrx

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This spot and some smaller ones appeared this morning. I did give first good watering and very dilute nutrients yesterday and did get some on the leaves. I'm 20 inches from 3000 watt LED reading t0K lux. 5 x 5 tent with good air exchange plus 2 small fans blowing on the plants. Temp 81 degrees Humidity 50 percent. Thanks for any help. This is my first grow. I do not see any insects.
 
What could these spots be
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