Whats wrong with my big girl?

[Carbon]

Ok guys so ive got some problems with my big blue himalaya girl. I wont take an age explaining what i think because i dont have a clue so ill say my basic set up and show some pics :thumbs:

Tent: Ds60
Light: Grownorthern Ms0006
Soil: Plagron light
Nutes: Oldtimers bloom (maybe to much?)
Temps: 75-82 (min-max(ish)
Humidity: 40-50%

Having a bit of a stoner moment and cant really think what to add so heres some pics

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Any help would be much appreciated, seems to be getting worse fast!
Last watering was plain ph'ed water at 6.5 :thumbs:

 

[Bgrt]

whats your runoff like?

it looks like cal mag deficiency as atleast a part of it but maye thats just necrosis from something else.

looks hungry or lockedout aswell
just a guess and a bump.

 

[Carbon]

Not sure on run off will test asap, i thought cal mag too but having really hard water pushed it to the back of my mind until just now finding out led can deplete cal/mag.

Any ideas what the quickest fix for cal mag is?

 

[Bgrt]

i just have a bottle of cal mag that i use. ive been using it most feeds with hard enough water and still had some problems using hps theyre just very hungry during flower.
some use unsulphured molasses but that might only work in organic and might be slower im not sure. though id wait for a second opinion.
could be a general lockout stopping everything above/below a certain point. id say youll get more useful help with a recent runoff. take the first 15ml or so of the runoff, if you take alot of runoff it will be scewed by the water going in and wont be accurate.

 

[Muddy]

I agree, most likely a cal/mag deficiency. If your run off is high then it's likely caused by lockout. If your run off is good, then you need to supplement either with a cal/mag solution or with molasses and epsom salts. If you have a cal/mag supplement, mix up a mild dose and do a foliar feeding. Use about 1/2 the recommended dosage. But check the run off first so you know for sure.

Cal/mag deficiencies are common under LEDs. Seems they are so much more efficient they use it up faster. I always keep some solution on hand, along with a P-K booster, like PK13.14, as P deficiencies are also common under LEDs.

 

[Carbon]

Thanks for the replys guys, shes had a feed with cal mag now manage to find some at the local hydro store :thumbs:
Going to get some ph buffer solution to check my pen tomorrow, its still really new but best to be safe
Once i have that ill test run off and see where im at there. If its all good ill be going ahead with a foliar feeding.

Thanks again for the help guys, be lost without afn!!