Yellow edges on sugar leaves...

[Nacho34]

Day 81 notice these yellow edges creeping towards the flower. I water everyday to runoff (coco) general hydroponic.
3lm calmag
2ml grow
4ml bloom = 860ppm with tap included
Ph 6.1~6.2
16" from led

 

[Tom Bombadil]

all same plant or strain?

 

[Nacho34]

The bud in the front is another plant. Everything in the background is the auto white haze, the having prob.

 

[Waira]

Nacho, what's the run-off pH and ppm? That's what tells you if there's a salt build-up in there, and if the pH is still OK,...
Could be a couple things, I need a better pic though...It looks like a touch of K defc., or ironically, toxicity, the symptoms are nearly the same-- tip and margin teeth burn,... Zn defc. can present similarly, and since it's up high, that may be the more likely issue... Zn is immobile, once in the plant and established into tissues it can't be translocated again to newer growth for support like other mobile nutes can,...
What's the waters ppm?