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Questions Wondering what this could be please


Gehenna
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Eucalipto
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Hey all hope everyone is well and safe!

Quick question on what this could be? I thought it was calcium  deficiency but that hasn't seemed to fix it.

It's on the same feed as the other plant also a jack herer and the other one seems fine.

Light is about 34inches away and they are on 20/4

Also should the plants be lst at this point? Any advice would be great as it's my first grow.

Thank you 

Grow Medium
Coco Coir
Grow Light
Led 450w
Temperature C/F : (Light on/off)
24c/22c
Humidity
62
Picture of Problem
20210821_201636.jpg
Nutrients

Goliath nutrients a+b
Silica
Rhizotonic
Calmag

pH Level
6.2
EC / PPM / TDS of Feed

1.2ec

Feed Frequency
Everyday
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Gehenna
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Eucalipto
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20210822 210324
20210822 210324 1
20210821 201720
20210821 201715
20210821 201604
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Gehenna
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Eucalipto
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Sorry they are 19 days old ( apart from the front right one)

The leaves also seem to be very light on  that plant with and issue not sure if it's genetic😊

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Gehenna
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Eucalipto
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This one is of the healthy plant still has abit of browning but much less, but seems healthier 

20210821 201538

 

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greentomato
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Caryophyllene
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Honestly looks like you just got some feed on the leaves when watering but I don’t grow in coco so don’t take my word for it 

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WoodI2
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OG
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Valencene
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@Gehenna, Looks like it certainly could be water on the leaves, like @Greentomato said. That's what I would say too. just keep an eye on it. Try not to get them too wet and if so make sure to have lot's of air movement. The light green could be from light level of nutrients. Your EC should tell you what's, what. In all, they look good. As you know it's better to be light on the feed than heavy. Increase if you can't keep your hands off of them, but be patience and wait for a proper response. 

Hope this helps!        peace

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Macky
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Beta-Pinene
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Youre in coco, but using 6.2 pH. This is ok in flower, but for veg its best to have around 5.8 to prevent nuits being locked out Smile

I think thats the problem here. When you feed again today, make sure the pH of the feed is 5.8, the EC seems fine so keep that the same.

Make sure you get plenty of run off and test the run off to make sure it is between 5.8 and 6.2 pH 

I think this will get you back on track Smile

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Mr_bud
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Caryophyllene
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I think there is a water droplet on one of the leaves on one of the pictures try water around the plant avoid getting the feed on the leaves also is that your lights only just coming on I only ask because the temps seem a little on the low side on the thermometers 

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