Hello BabyYoda, I do not believe that this is done by bugs. If that would be the case then the damage would be far more random and those spots on the leaves are all starting on the same place on the leaf and they all look identical. I do think that this is a starting deficiency due a wrong pH value. The pH from your nutrient solution should be in between pH 6 and 7 when you are growing in soil. Plagron are great nutrients but my advice is to add a cal-mag supplement once a week. Enjoy your grow!