Light Green Yellowish Leaves

[speed420]

Hey guys just wondering what you think maybe the problem with really light green/yellowish leaves. They are under a 630 watt CMH light. They are in coco/per mix and feeding around 400 ppm.

They seem to droop before the light goes out. They look more yellow in person then this pic. I am giving a low dosage of cal/mag I am using AN grow/micro/bloom

 

[AutoWonders]

Fill out the infirmary form. It will help.

 

[Arthur]

Yep gonna need more than that.

Reminds me of when I was a motorcycle mechanic and a customer would call and hold the phone up to the bike for me to "diagnose".

That aside, coco is a mg grabber, supplementing cal/mg?

 

[speed420]

Added pics and more info. thanks

 

[Arthur]

pH of feed? pH of medium?

Looks overwatered, very hard in coco... something is off.

Did you flush and pre-charge the coco before use?

 

[Arthur]

A droop before the lights go out is normal, but this looks like more than that, usually see just that a slight drooping of the leaves, the stems I rarely see droop.

 

[speed420]

pH of feed? pH of medium?

Looks overwatered, very hard in coco... something is off.

Did you flush and pre-charge the coco before use?

PH of feed 5.8
Run off ph is 7.1

Coco was pre buffered and i flushed/ pre charged

The both plants were looking good nice and green tell the last 3 or 4 days. Now tomorrow morning they will both be standing up and looking good when the light comes back on.

 

[Arthur]

Yep, I don't use runoff, cause its what's no longer in your pot, I slurry test the medium. But..
For almost all nutes coco is 5.8 to 6.2 medium pH. Your blowing over 7 out.

Bet your well above 6.2 in the medium
pH is like earthquakes... you can handle a 6.2 but it goes up exponentially.

 

[Arthur]

I say most,
I run a different line that is calcium based, not salt. I run well into the 6.8s in coco in flower, but it is needed to transport nutes with a calcium molecule instead of a salt.

 

[Mizzo81]

I see the air line going in I’m assuming you’re using the air domes?