Phosphorous Or Calcium Deficiency?

[Joint Monster]

I only have one cut of this pheno, the other strains seem to be fine for the most part.

Symptoms on this plant:
Some curl on outer parts of top leaves
Some copper/rust spots
Middle of the plant - leaves are black/burnt and crispy

I'm leaning towards Phosphorous deficiency? Or Calcium, but I don't think so.

Feeding: 2.5ml/gallon CalMag, 5ml/gallon Micro, 5ml/gallon Grow, 2.5ml/gallon Bloom
RO Water
PH: 6.8
PPM: Roughly Around 850PPM
From cuttings, over a month old easily.
In FF Ocean Forest Soil.

 

[xtraLRG420]

Not seeing any rust spots there bud. These are rust spots:

I saved the leaf in a pressing for future reference. This would be a calmag fix. Yours is looking more like phosphorus.

 

[Joint Monster]

Not seeing any rust spots there bud. These are rust spots:
View attachment 4464684
I saved the leaf in a pressing for future reference. This would be a calmag fix. Yours is looking more like phosphorus.

Yeah maybe not the best wording. They're more yellowing tiny spots here and there. I'll try to get better pics. I'm just confused as the nutrients are pretty on par and 5 other strains seem to be fine.

 

[jpalms27]

I think I have the same problem

 

[OneHitDone]

If that is GH Flora Series I'd say your low on the Bloom but being in soil it makes it hard to guess.

This seems to grow well for me in veg:
CaliMagic 2.5ml Micro 6ml Grow 2ml Bloom 8ml