Issues during stretching

[DummyGrower]

Hello all and the infirmary, long time no see. (I guess that's a good sign)
So my girl started flowering not long ago, and a good stretch that I caught a bit late I think, hence the burnt tips.. Seeing too many thin branches, I chopped many of em to leave the biggest ones. A couple days after that chop, burnt tips and eges appeared, as well as some big brown spots and patches, a few on the top, a few at the bottom.. Leaves overall a pretty light green (looks actually even worse on the pics)
So, I guess some is due to a bit of light burn, but am I also seeing a general deficiency of main nutrients?
Thanks in advance for your educated help
https://www.autoflower.org/ubs/rqs-fruit-spirit-photoperiod.1664/

Problem: brown/blackish tips and edges on top, brown spots/patches on some recent growth, brown patches and crumbling leaves at bottom, overall light green coloring

Medium/grow method: soil - biobizz all mix

Feed: and supplements used: 25g of RQS Easyboost in pellets straight in the bottom quarter of the pot (6-7-12)

water source: Bottled water with 6.39 PH

Strain/age: Fruit Spirit Photo / 77 days

light used: Mars Hydro TS1000 dimmable at 100% at 21in height (just raised them from 16in)

Climate: AVG RH 47% Temp 73.4

Additional info: see top

 

[Lil Dab]

So, I guess some is due to a bit of light burn, but am I also seeing a general deficiency of main nutrients?

I honestly don't see it being too much light with that light at that distance from the canopy. She looks hungry and I don't think it's a lockout issue just a big girls being hungry.

 

[MoparMad]

Just my o2 but it does look like you have issues. Is your ph in line? I agree that it looks like it may be starving

 

[DummyGrower]

Thanks for your quick replies. TBH I don't check my PH with much details, but always followed the same recipe of soil, water and Easyboost pellets, and I never had such issues. At the same time, I've never used such a big pot... I guess I'll give it a good topfeed and get the lights back at 18in and see how it goes. (I might get rid of some of them leaves too)

Much respect

 

[Frankthetank]

I’m betting she’s used up the pellets, being such a big girl. You’ll want to add something additional….