Yellowing Leaves Week 9 of Flower

Hey troops,

Here are the high level details so as not to waste anyone’s time as I know specs and pics are key:
Strain: GP20
Tent: 2x2x5
Light: 2 x SF1000
Medium: soil (ProMix Organic, perlite, ewc, 444)
Conditions: 80f 60%rh
Feed: Neptunes seaweed & fish fert, 284, h20
Stage: week 9 of flower

The yellowing has only really started in earnest over the last week or so. There haven’t been any stressors on her to this point, so I’m not really sure. I would have said cal mag but municipal tap water is fine, so then zinc/ph issues crossed my mind. I don’t ph test and have never really had to. The yellowing is mostly localized to the lower leaves, but it appears it’s moving upward.

Appreciate all y’all smart people taking a look for little ‘ol me Have a great weekend

She's feeding on herself, transferring mobile nutes from the fan leaves to the tops.. This late in flower I wouldn't worry about it.. You could add a little fish fert if you want..