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I’m in coco so water twice a day with a good 100ml run off both times

I’m feeding 1.4ec using just A&B and add 5ml cal mag the overall EC is 1.4 the strain is BLUEBERRY OG

They’re under 600w HPs the lower stuff does seem ok it’s more the light centre

It is only effecting the parts near the light so I’m very unsure here haha

@curious2garden hi mate thanks for your advice suggesting cal mag def they’re currently getting 1.4ec with 5ml cal mag In that to around 12 litres of water twice a day till substantial run off anybody have any idea where to go next

Finally got some pics haha this is what I’m dealing with

No worries I’ll get some tonight

Afternoon guys I got some better pics here can anybody help judging off these?

So maybe up my nutes a little?

I’ll get my brother to grab a picture tonight just as the lights go off the blotches on the leaves are mainly under the light itself and it is fairly close maybe too close but I’m unable to move it any higher due to tent size

Now that makes sense as it’s only in the area closest to the light and right in the centre due to plant size I physically can’t get lights any higher would you suggest they’ll be fine? They have maybe 4 weeks left

Or of course in the same respect maybe cut it out as the the symptoms look the closest to calmag or p and calmag def is what I noticed early on

I’m still using calmag at 5ml for 12 litres of water do you think maybe I need more cal mag they started looking deficient early veg and iv never upped the cal dose since then and of course they have gotten bigger maybe they’re now deficient at a late stage?

The picture didn’t load mate could you try sending it agai.

They’re in flower quite late flower actually pal

When you say toxicity issue what exactly do you mean pal too much of something? Cut back?

I’m never here during lights out pal and try to stay away from them once the lights go out the pics taken are of what is effected everything else seems fine all a nice fresh green colour

Hi guys so I’m fairly late into flower now and just started noticing this any idea on what it could be? Feeding 1.4ec with 5ml cal mag as part of the overall EC only noticing this in the centre of the plants everything else seems healthy

Afternoon lads so I started giving just under half strength cal mag today the one finger leaves seems to have stopped since they’ve been on 24/0 I have started noticing a darkening towards the edge of the leaves like a greyish black what would you guys recommend with the cal mag and A&B included...

Afternoon guys noticed this today very hard to see in the light it looks like cal mag def the last pic is off google and it looks very similar to this