Nute burn or to much light

Jacke30

Well-Known Member
Hey y’all
Leaf tips are yellow some curling at the tips
(Serrated edge curl I know is from VPD being a little off)
Using house and garden coco base plus supplements and additives
Mix
Ph 5.9-6.1
Ppm 1600

Runoff few days ago was 2500ppm
Did a light strength mix then today I went just calmag flush
No ppm is 1700 at run off


Just entered 5th week of flower

temp 75 degrees
Rh 60%
Leaf VPD 1kpa (I’m gonna raise to 1.2kpa)
Running c02
Ppfd 1050 at the center of canopy

Would y’all say this a nutrient burn/salt build up issue or am i putting out to much light
 

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