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Sugar leaves yellowing, rusty spots- guys please help ..


RNG
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Eucalipto
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EC:1.1-1.2 / new BlueLab pen calibrated 

Tap water : 0.0 EC, i'm adding cal mag till 0.3 -0.4 ec, than nutrients till 0.9 (1ml/ L)  and pk (0.25/L) together EC:1.1-1.2 

Nutrients: Buddhas Tree 

pH:6.0 /new BlueLab pen calibrated 

Temp: 25-27 C

Humidity: 45-55 %

Light: HPS 400, 18 inches above plant

COCO, watering daily with 20% run off 

Ventilation: 360m3, 1 mixing fan 15 W at top, another at bottom

Plants are flowering and its getting worst every day, sugar leaves are yellowing,tips are brown/ block, edges yellowing,i am getting crazy, leaves drying getting spots, this is coming from TOP to bottom 

IMG 20200904 100134   Copy
IMG 20200904 100128   Copy
IMG 20200904 100123   Copy
IMG 20200904 100026   Copy
IMG 20200904 100009   Copy

 

 

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RNG
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Eucalipto
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Black not block :>

Sulky

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RNG
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Eucalipto
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I just tested run off it's 1.4 ec 

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Macky
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OG
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Looks like too much calcium mate. You need to bring that back a bit, I would drop it all together at this stage mate 

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RNG
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@macky

Thanks mate!

So something like this :

0.2 cal mag

0.6 base nutrients

0.2 pk

Together ec 1.0? Should I try something like that? 

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Macky
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OG
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Lets see the pic first mate and then we will figure it out Smile

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RNG
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@macky back with some photos. one important thing blue dream matic, plant with crispy leaves was looking at begin like amnesia. thats why i am afraid because its looking like same problem.. its progressing with flowering stages. ask me anything i noted everything  

Amnesia : 

IMG 20200904 131521   Copy
IMG 20200904 131508   Copy
IMG 20200904 131454   Copy
IMG 20200904 131428   Copy
IMG 20200904 131417   Copy
IMG 20200904 131404   Copy
IMG 20200904 131353   Copy
IMG 20200904 131332   Copy
IMG 20200904 131320   Copy

Blue dream matic -first plant : 

 

IMG 20200904 131823   Copy
IMG 20200904 131712   Copy
IMG 20200904 131659   Copy
IMG 20200904 131626   Copy
IMG 20200904 131618   Copy
IMG 20200904 131603   Copy
IMG 20200904 131556   Copy
IMG 20200904 131549   Copy

Blue dream matic -second plant :

second dream matic
second blue dream matic

Blue dream matic -third plant :

third blue dream matic

 

together

 

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Macky
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OG
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Difficult one man, looks like a pottasium def more than anything, but its not usually displayed at the top like that, more the middle leaves..... but pottasium def is most likely, unless you have a fan/ intake vent pointing directly at that plant thats caused wind burn?

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RNG
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@macky no chances for wind burn 🙁

Should I increase from 0.25 to 0.4/L?

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