What is this leaf telling me?

[Chris Stroupe]

Does this look like a nutrient burn? Or defeciency?
Maybe zinc, calcium, magnesium?
I'm running DWC
Floraduo part B 1-5-4
Diamond Nectar
CALiMagic 1/4 dose
Koolbloom 2-45-28

Day 73 from seed under LED

 

[Waira]

it looks K related,... was there a pH hiccup recently? K is more tricky than other for diagnosis sometimes,.. the burning of "teeth" tips and along the margins happens with both defc. and toxicity,... I see tip burn on other leaves, which makes me lean toward this being a over-dosing things, .. that Kool Bloom is fierce stuff! What are the ppm/EC in there, and how much of it is the KoolBloom?

 

[Chris Stroupe]

it looks K related,... was there a pH hiccup recently? K is more tricky than other for diagnosis sometimes,.. the burning of "teeth" tips and along the margins happens with both defc. and toxicity,... I see tip burn on other leaves, which makes me lean toward this being a over-dosing things, .. that Kool Bloom is fierce stuff! What are the ppm/EC in there, and how much of it is the KoolBloom?

The only PH issue I had was PH being a tad low like 5.4 to 5.6. Yea I was leaning to a bit to much koolbloom too I might have been heavy handed on it in attempts to fatten these buds lol . PPMs 900-1000 and was using about 5ml in each bucket. Each buckets hold about 2 gallons with roots in them.

 

[Waira]

just watch those tips/margins for progression,...and ease off the KoolBloom more until you're sure things are calmed down,... that hiccup might have triggered things, it doesn't take much drift to muck availability up!

 

[Chris Stroupe]

just watch those tips/margins for progression,...and ease off the KoolBloom more until you're sure things are calmed down,... that hiccup might have triggered things, it doesn't take much drift to muck availability up! View attachment 765810

I will do, thanks for the help