Help. What deficiency is this?

[Hgrow4]

On some leaves on most plants they are brown marks I have attached photos.
My plants are week 4 of flower.
They are in coco the temp is 29 degrees and 55% humidity.
They are in coco and I am feeding shogun nutrients daily.
Any help would be much appreciated
Thanks

 

[2Bad]

Following along

 

[GreenGalaxyFarm]

coco ph?

 

[Hgrow4]

coco ph?

5.8

 

[citrus7144]

It kind of looks like LED light burn how far away are your lights and what kind? LEDs can give you that weird bleaching effect. I would raise the lights a bit and maybe stop feeding for a few days just to see if it is lights or nuts burning them.

 

[Moshmen]

coco ph?

Looks like this right here maybe number of fertigations?

 

[GrilledCheeze]

The leaf curl in the middle picture suggests nitrogen toxicity. I believe that can also lead to the necrotic spots on the edges of the leaves. This could always be secondary to something else. I don't grow in coco so I'm not much help with the overall picture.

 

[GreenGalaxyFarm]

5.8

stage of growth i would try to get it up to 6 not higher than 6.2

 

[2Bad]

The leaf curl in the middle picture suggests nitrogen toxicity. I believe that can also lead to the necrotic spots on the edges of the leaves. This could always be secondary to something else. I don't grow in coco so I'm not much help with the overall picture.

great eye man. I didn't even catch it.