K, Mg, deficient or Ca toxicity ?(pics)

[orbad]

Strain: Critical wk 4
Medium: happy frog soil
Nutes: AN iguana 12ml, B 16ml, sensizime 16ml, rhino skin 8ml, Nirvana 8ml, and GO CaMg at tsp per gal.
RO water
Ph: in 6.3 out is higher
Temps 72-4
Humidity: got real high for a bit yesterday 89 but is back to 76 today (turned exhaust fan on full time)
600w hps in 4x4x7 tent
Plant needs water. Going to flush 1/2 gal straight RO (PH'd) then water with full strength nutes. 1/2 gal per 2gal container for a light flush.

Let me know if you need more pics to help. Thanks guys the forums are helping a ton.

 

[growdamnit]

just the old leaves? how bout a pic of the entire plant?

 

[kushtrees]

are those the recomended does for B vitamin, nirvana and sensizyme, they seem really high

did that start after your humidity spike? High humidity can cause Ca def, but that doesnt look like a Ca issue to me, maybe a super mild one. I also doubt its Mg as there is no yellowing in the viens, if thats on older leaves my guess would be K def, looks like your stems are a lil red also which also points to K. I would wait till someone else chimes in thats a guess on my part, more info would help

 

[mastacheeser]

my guess would be its just the old stuff
have you defoilated?
is it just happening on the leaves that arent getting alot of light?
ive also noticed increased yellowing when i over/underwater

looks like its going to be some fire!

 

[ttystikk]

I think that's a healthy girl, and you're just seeing the beginning signs of the plant concentrating its efforts on the buds rather than the fan leaves.

Uploading a deficiency chart:

 

[growdamnit]

N def is common during flowering

 

[orbad]

It is just the older leaves.

I'm removing leaves that directly block light to buds and or that are blocking airflow through the plant.

Nutes: I'm going off of a medium feeding chart from an. So yes they are recommended.

I noticed the problem after he RH spike but I don't think it caused the issue.

More pics tonight when the lights come on.

 

[orbad]

More pics. Friday will be the start of week 5.

 

[Bubblehaze]

Its normal in my experience. Specially when they are flowering hard.

 

[jyip]

appears to be normal to me, jus the plt using up resources for ur budz

 

[orbad]

All is good plants are trimming up nicely.