Sick Plant Plants look burnt unsure

It looks more like it might be deficiency. There's brown patches here and there in the yellowed leaves. What do I do?? Am I fucked?

Can you give us some more info to go on regarding growing conditions, like light levels, temp, humidity, media, feed, air circulation, etc.?  Do you know what PAR or DLI you have at canopy level?  If not, what about light manufacturer, model, and distance from top of canopy?

Also, are you seeing it on all the plants of the same strain at the same height? If not, you probably have a deficiency and we need more info about feed and levels to help.

Looks like you and I were thinking the same thing at about the same time -- maybe more like deficiency. What medium are you growing in? What have you been feeding?

Is it only happening at the top of the plant?  If you have brown spots on top with chlorosis and interveinal chlorosis, then it is likely a manganese deficiency, an immobile nutrient. If so, you can get manganese in GH's Flora Micro.

Hope that helps.

@im_sparky The light levels were about 900/1000ppfd but I've reduced them again to 800-850ppfd. Distance from the left is 15 inches thereabouts. 

My lights are 480w led lights I forget which brand but I believe they're Samsung diodes. My humidity is in the 55/60% range usually my ph is usually bang on 6. 

Yes it seems to be all at similar heights or whatever is closest to light coverage from what I could tell and mostly the left taller plant. 

I'll have another look. Lower buds don't seem affected from what I can tell. 

I'm using coco coir with pearlite and I'm feeding with the canna nutrient line and adding calmag with every feed. 

@im_sparky Is this the one? I'll order it now. 

: VitaLink GHE 05-215-055 1L Flora Micro Chelated Microelements

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Hmmmm.... if you were pushing 1000ppfd, then it is possible are running out of CO2 and starving the plants of nutrients; my hunch is you have a Mn deficiency.  I don't grow in coco, and don't use Cana, but others here certainly do.  Can you check the label and see if it has manganese in it? If it doesn't, then that supports my theory. Cannabis can take A LOT of light, but when you push 1000ppfd and beyond, then everything needs to be spot-on with nutrition and water, and CO2.  My hunch is you were pushing them and ran into a deficiency.  I could be wrong, and others will jump in, I'm sure, but that is my hunch.

I've got micros growing at 1700ppfd for 20/4 hours (that's a DLI of 115!!!), and they are loving it, but they get extra nutrition, micro nutrients, water, and also CO2.

Posted by: @silentbutdeadly224

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Is this the one? I'll order it now. 

That is the one, but hold on until you can rule out other possibilities after hearing from others.  Does Canna have Mn in it? If so, I may be wrong.

Also, do you have a grow store near you?  If so, and if I am right, then the sooner they get the Mn, the better. Nutritional deficits usually show up about 10-14 days after the fact, so a fast diagnosis and remedy here with an immobile nutrient is what's needed.

@im_sparky Ahh, I see; that makes sense.  Ok I'll get that supplement and add it.

@silentbutdeadly224, it looks to be calcium to me. Since your in flower and your needing more cal/mag and if your pushing the PK you can easily lock-out the calcium. It's pretty common, then it moves into a Baron defis from the lock-out. There's nothing to do about the affected leaves but adding more cal/mag would be next, but I don't know about coco so Monkeydo or @Bubblehok would know best. Good luck