!URGENT! Leaf problem

Blackjack strain 4-5 weeks into flowering on 10/14 watering using Alaska bloom in perlite/vermiculite. What is happening and how do I fix it? all of my leaves look like this.

nute burn, too much heat, underwatering? any of those you think?

It looks very strong over fert 2 me
And also what is ur ph
Also have u tested the ec/ppm and ph
Of ur run off
I can see some very bad clawing going on in that pic
However some pics would b very helpful
When do u feed
How much and how often

pH is unknown, because I have a crappy pH meter, Im working on getting an ec/ppm meter. I will usually only feed once a week alternating with and without fertilizer which i'm using at half the recommended dose. I believe that it's pH, but I have no clue.

What temp is it inside your grow box ?

20C-21C when light is on. There is a pc fan circulating air around the box and two pc fans pulling air out.

You need to get a handle on the ph. Its messing with the uptake of the nutes which is why they look like this. You need to be adding ph down to your tap water. What water are you using?

You can also get a cheap ph test kit for under $10

ooooooo not good bro pc fans are too small. your beast needs a 12" fan and it needs i to be pointed at the lights. your plants leaves are shiny and wilted from being nute burned BECAUSE the heat is way too high. high heat causes nutes burn to happen!!! keep feeding her 1/2 strength every other watering, get a fan now so you dont lose any more progress

n4alpaca said:

pH is unknown, because I have a crappy pH meter, Im working on getting an ec/ppm meter. I will usually only feed once a week alternating with and without fertilizer which i'm using at half the recommended dose. I believe that it's pH, but I have no clue.View attachment 1696211View attachment 1696212View attachment 1696213View attachment 1696214View attachment 1696215

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is this to say that you give liquid 1 time per week?
period?
nutes one week none the next?
cuz you need to water more than once a week man
if that's not what you meant, well... teehee

call me kooky, but i don't think that's burn
i think they're thirsty and i think they're hungry and if i'm wrong then i'll know, but that's what i think

Well n4palca, whats going on? Doing better?

Looks like a N def, can you post a pic of the whole plant?