Bottom leaves started to turn yellow and some stayed green but started to get spots

[AF420]

Bottom leaves started to turn yellow and some stayed green but started to get spots and tips to die. The problem started a few days before start flowering. They are on 2 week of flowering, i use all biobizz products and they are under hps 400w. Planted on soil with coconut fiber hummus and good drainage. Good genetics. Not sure if it's over feeding, I don’t think so but don’t know what the problem is. The problem is getting worse cuz upper fan leaves are getting spots and yellow too. Plz help thx

 

[Trichomefarmer88]

Is your ph at the right place?

 

[AF420]

I think so, I always check ph of 6 before irrigation... Maybe ph meter be not calibrted? Plants are getting worse...can you go to my post to see updated pics plz?

https://forum.growweedeasy.com/foru...06074-leaves-turning-yellow-and-getting-spots