Small holes and yellow spotting on some of my indoor fan leaves

I am into week 4 of veg. Just noticed small yellow splotches on a few of the fan leaves on my goldleaf strain. Has anyone seen anything like this b4 or know what it is and how to treat it…any input will b appreciated. 1st indoor grow.

Did you give them any foliar spray at all?

Yes…ive given them a little bit of cal mag from my gallon jug that i poured into a spray bottle…other than that they only get distilled water in the spray bottle. And i always check the ph of the water.