Weird yellow and browning on leaves.

Not sure the issue here. Never had issues with this plant went away for a week with someone watering them when needed. Came back to this all over the leaves. I removed a lot of dying leaves yesterday, Raised the ph cause it was a tad low and sprayed with a hydrogen peroxide mix. Not sure what exactly the issue is here if someone could tell me what and how to treat would greatly appreciate it.

What's in the pots?
What have you been feeding?

It’s pro mix in the pots. Feeding it advanced nutrients once a week. Same as I have been. You think it’s from nutrient deficiency? Should I maybe feed it twice a week? It’s really humid where I live so been dealing with that. Had a bunch of bud rot and powdery mildew on my autos. Ended up making it to harvest. This is my First time growing so really at a loss here

The plant is definitely showing some acute deficiencies.
Assuming the pH is reasonable, the problem is not enough nutes available in the medium.
Promix is predominately peat; it lacks nutrients, so you need to provide them.

Phosphorus deficiency