Brown/Gold Spots on fan leaves

Girls have been healthy overall and all of a sudden I have these brown/gold spots that I think could be water burn but I would like a few more opinions.

15th day of veg. They were under 2,000 watts until 2 days ago when they got transplanted. Now they are under 4,000. Feeding has gone up too 700 PPMs. Ill admit I havent been watering as often as I think I should, so maybe nute burn?
It has also been a little hot, got up too 86 but I got an A/C today so that should change.

I pray this isnt fungus, please tell me its not fungus.







Otherwise very healthy plant








One day later getting worse, fed last night with CalMag 7.5 ml per gallon

Magnesium deficiency and there's also a separate issue causing the leaves to become lighter green. That one would be either N def or soil Ph.

You can treat with lime. I like to use Cal-Mag to treat this deficiency. Get on it quick, as it develops rather rapidly.

Yeah it looks like a mag deficiency, for some reason many products don't offer cal and mag in the same bag, which to me is odd seeing how the plant really can't have one without the other. It's kind of like humans needing vitamin D in order to absorb milk.

Highly doubt its a fungus, I had what looks like the same issue, bought some MagiCal (cal/mag) and stopped it from all new growth. Check the link... https://www.rollitup.org/marijuana-plant-problems/385209-someone-please-help-diagnosis-cure.html

Thank you guys for the responses. I use CalMag in every feeding.

Here is a list of my nutrients during Veg
GH 3 part
Liquid Karma
CalMag
Roots Excelerator
Hygrozyme
2 drops of Superthrive per gal
and every other feeding
beneficial bacterias
silica

I am feeding them calmag accelerated formula now about 7.5 ml per gal.

I hope this helps, if anyone has any other ideas please let me know. THANKS

Oh I would also like to mention that it is not on any of the new growth.

I still say it is a Calcium/magnesium issue. I have seen it too many times because I use distilled water. One thing never mentioned in the posts was the PH. Also, if you are using a generator to create ozone or to power those lights, the exhaust could be causing the spots, but on older growth only is questionable... That just sounds like a mobile element nutrient deficiency.

Mother's Finest said:

Magnesium deficiency and there's also a separate issue causing the leaves to become lighter green. That one would be either N def or soil Ph.

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The soil PH is 6.4 and do you say lighter green because of the last picture or the first ones? The last picture was under the HPS light and makes them look crazy yellow. But the top pictures are under normal lighting, what do you think of the color there?

I will be be flushing them for a few days so if it is the soil PH this should help. I am also feeding them at 6.4 which with previous harvests I had done at 6.2, should I return to a lower PH?

After the flushing I am thinking about feeding 1-1-1 again instead of 1-2-.5 (micro, grow, bloom) from my last feeding. Do you think this will help my deficiencies or should I take a different approach.

Serapis said:

I still say it is a Calcium/magnesium issue. I have seen it too many times because I use distilled water. One thing never mentioned in the posts was the PH. Also, if you are using a generator to create ozone or to power those lights, the exhaust could be causing the spots, but on older growth only is questionable... That just sounds like a mobile element nutrient deficiency.

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Yes I am feeding just CalMag tonight 7.5 ml per gallon, I hope this will help. I plan on flushing for a few days after that or should I continue with just calmag for a few feedings? No ozone, but yes I am using RO water.

Also I am PHing to 6.4

What kind of water are you using? It could be a chlorine deficiency, which will happen if you are like me and rely too much on distilled water, that will also make them pale apparently.

Purplekrunchie said:

What kind of water are you using? It could be a chlorine deficiency, which will happen if you are like me and rely too much on distilled water, that will also make them pale apparently.

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I had a reverse osmosis filter. So RO water.

GreenLight said:

I had a reverse osmosis filter. So RO water.

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On a side note, I feel really stupid when people discuss RO water, I know not 1 thing about it haha.

they are fine ,continue as you are. Plants are healthy.

I kinda have the same issue but not as bad. I am 2 1/2 weeks into veg and just to small leaves on the bottom of my plants are like that (not the seed leaves lol). Nothing on the new growth and it hasn't really gotten any worse so, Ill keep updating in this thread.

Ant Grows Dank said:

I kinda have the same issue but not as bad. I am 2 1/2 weeks into veg and just to small leaves on the bottom of my plants are like that (not the seed leaves lol). Nothing on the new growth and it hasn't really gotten any worse so, Ill keep updating in this thread.

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If its just the bottom most leaves it could just be the plant getting rid of them, out with the old in with the new!

But with mine its not the bottom, totally random just not on new growth. Mostly the Big big fan leaves toward the middle.

Good luck, take some pictures.

*BUDS said:

they are fine ,continue as you are. Plants are healthy.

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haha you would think but no, something is going on. Woke up today and some of the leaves that had it worse are now crisping and curling up at the tips. So I believe this is most definitely MG deficiency unless someone can tell me otherwise. I will take another set of pictures and hope that calmag only with help and then some serious flushing.

If I am having these problems with RO water should I flush with tap a few times or will that cause more problems?

Here are some of the leaves this morning, obviously the worst of them.

So what happened ??? did ju fix the problem??/ i have the same problem with my older bigger fan leaves. and im in the 1st weed of flowering.

I fed them 7 ml of calmag per feeding since then and it hasnt spread much. Next time I am adding lime to the coco and flushing it out really good when I transplant them in.