Afgan kush and grape og grow need help to identify problem plz

I'm growing in coco drain to waste been noticing a few problems with the leaves I thought it was a cal mag deficiency so treated with a foiler cal mag nutrient.
I removed all the bad leaves but the new growth seems to be cacooning and is light green im feeding the plants 1.4 ec and the ph is 5.8. I checked the run off a few days ago and it was reading 2.8 ec so flushed til it was back down to 1.4 and have carried on feeding at that but I'm still not happy and im not going to flick them until Ive solved the problem so can any one help plz... here are the leaves I removed 20190208_000126.jpg
 

MR. CLAYS

Active Member
I'm no expert but had a similar problem. Get yourself some roots organic hpk. Cleared right up for me. Can't say enough good things about it.
 

curious2garden

Well-Known Mod
Staff member
I'm growing in coco drain to waste been noticing a few problems with the leaves I thought it was a cal mag deficiency so treated with a foiler cal mag nutrient.
I removed all the bad leaves but the new growth seems to be cacooning and is light green im feeding the plants 1.4 ec and the ph is 5.8. I checked the run off a few days ago and it was reading 2.8 ec so flushed til it was back down to 1.4 and have carried on feeding at that but I'm still not happy and im not going to flick them until Ive solved the problem so can any one help plz... here are the leaves I removed View attachment 4278329
I'm in coco dtw as well.
We need to see the entire plant(s) and know your lighting, feeding, feed schedule, environment (humidity temp). The more information you give us the more we can help.
 

curious2garden

Well-Known Mod
Staff member
Feeding them coco a + b, root accelerator
Amino treatment
Do you use Tap water what is the EC?
If you use Tap water does it have Chlorine or Chloramine?
How much coco a + b / gallon and what is the EC after you add just that to your water?
What type of light and wattage?
Environmental temperature and swing?

For the moment I'd knock off the Amino treatment and root accelerator, add some Mg.
 
Do you use Tap water what is the EC?
If you use Tap water does it have Chlorine or Chloramine?
How much coco a + b / gallon and what is the EC after you add just that to your water?
What type of light and wattage?
Environmental temperature and swing?

For the moment I'd knock off the Amino treatment and root accelerator, add some Mg.
Yes I use tap water its 0.2-0.4 ec I let it sit for 24-48 hours before I use it.
I'm use 1.5ml per litre of a+b =1.2 ec including that of tap water then top up with 0.1 ml amino per litre and same with root accelerator to get an ec of 1.4-1.6 I'm using 600w hps light temps are 26°c-28°c (50%rh) day time-16°c-18°C(70%-80%rh) night time .
I did ad calmag through a foiler feed about five days ago and says to apply once weekly
 
Has anyone else got any ideas what it mite be or does anyone else agree with Mr.clays on the zinc deficiency i would appreciate anyone's input and advise on the matter thanks!!
 
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