Third Grow! I have holes on my leaves!

Hi,

This is only my third grow, but my first time growing regular seeds (not autoflower). I have 1 plant in a 5 bucket gallon and 2 plants in another 5 gallon bucket (I know, I fucked up putting 2 in one bucket!)

I woke up today to see that some leaves had holes in them. PH = 5.7-5.8 ppm = 450 for the single plant, 620 for the bucket with 2 plants. They are 36 days old, and this is there 5 day of 12/12
Any help is much appreciated!

Do you mist or did you possibly spill a little water on them? If they have water droplets on them when the lights are on it will magnify the light enough to burn the leaves. They look good though, I wouldn't worry unless it gets worse

Got a magnifing glass? Look under the leaf.