Spots! Hmmm?

Don't usually hover or worry about little things to much. Have a NYC Diesel from RQS that started to develop small spots. Perfectly round. So many things when it comes to spots. Fungus?Bugs?PH swing?Leaf septoria? Only really worried for bugs/fungus. Planted 7 others strains same time and everything else is fine. 21 days old.



Coco/Perlite
68-82F temps
35-60 RH
Water @ 6.0PH/Runoff 5.8-6.2 entire time
Megacrop @ 2g per gallon, 1ml cal mag

I get the same from time to time.
Not bugs. Or disease.
Sometimes condensation heats up from the lights and causes spots.
Or some nute water splashed around.
Never been an issue, whatever it is.