What are these leaves trying to tell me?

Hi, this is super lemon haze on my balcony. She is 25 days old, using biobizz light mix with biobiz grow nutrient. İ saw those sings 2 day ago on lower leaves... And older 5-6 leaves starting yellow on 25 days old plant!?
What are you think about it?

Looks like a ph thing usually when that happens for me I might swing that way if I’m feeding it. What ratio does the bag say? N-P-K it should be listed as numbers for example 20-20-20 or 5-10-5

Did you heavily water recently? Sometimes when I do a biweekly flush the leaves will do that even if I chase the flush with normal strength solution. It's usually a few leaves per plant though, nothing crazy. If otherwise I'd assume magnesium deficiency.