dang, wish I could help, you know someone will!
Thank you!
You see that bigger shade leaf to the left of the bud, how it goes from dark green at the tip to a lighter shade and back to dark, thats usually a genetic mutancy.
I think thats the case here. Sometimes itll only show on 1 leaf of the whole plant other times its many. Sometimes itll be yellow directly splitting the leaf in 2, which gives a wild look to it. Exactly one side yellow other perfect green.
It's interesting because how it's yellowing. It looked maybe like ph but my ph was in balance until I got home and it tanked but that wouldn't account for how the plant was acting before is exactly like this... plus I also realized in all my excitement this morning I may not have ph adjusted my res to begin with(oh well live and learn she fared well). And all the new foliage having that reaction makes me think you are right. Because as you said its showing up on new foliage in locations that are in accordance with other appearances and I'm seeing some single sided yellowing (as evidenced in my latest picture post).
Thanks for the help!
Not a mutant you would have seen this throughout the grow. Since its new growth it's most likely not a mobile element like nitrogen bc it would have pulled it from the other leaves. Since its in the transition it could be iron or micro deficiency. But other options maybe a ph fluctuation or maybe your resivior got to hot and caused heat stress. Everyone always jumps to calmag but that can't be ruled out. If it happened very quickly and overnight I'd bet ph or heatstress.
My original thought was deficiency and then I was thinking that obviously it would strike lower first. So I threw my hands up and went "I'm not going to screw up this big of a plant, time for help from the bug boys". I learned the hard way to keep ph checked and has been 5.8 to 6 or so without issue. As I stated above, it did tank after I got home. But I may have forgotten to even adjust the ph. Heat stress is possible. Another thought is temperature stress but my monitor says it's been steadily mid 70's no higher than 76 in the last 24 hours.
Thank you!
my guess is iron,but guessing is dangerous,so i is gonna call in a bit of help
@Mañ'O'Green 
@Boradan
good luck n keep er lit.
As you know I use general hydroponic maxiseries and it's in maxibloom part of the series which is "
supposed" to be complete... but we know how that goes. So it's all possible and with an aio solution it's not all plants inclusive.
Thank you!
Without being there and knowing the plant like she does an educated guess is all anybody can do on here. DWC has diffrent factors than soil or coco. If it was soil or coco I'd say iron but with DWC buckets temp and ph would be the first culprits I'd look at. Then micro deficiency and others. Also
@MissUniverse how close are your lights?
Well I appreciate the educated guesses
they are close. And that is a problem. About 12 inches away so now that has me thinking theres part of the problem. I'm just being so overly worried as I said in another reply. I just figure I'll bug some people and I'd rather look silly and it be as simple as the lights than lose a plant because I didnt get the ph balanced. Which btw was in check this morning but when I came home tonight was way off so it definitely made me stay aware of a situation that could have caused me a huge loss. Thank you!
@MissUniverse , I wish I could help but I am a soil girl. Never run DWC /Hydro.
The positive vibes are appreciated and are helping greatly! Thanks!
Im sorry i do soil. And i know everyone jumps to cal mag but in my opinion in soil i would say mag and not because its lacking but because soil ph would be to low... in soil case i would just water in higher ph next few and would green up again... but thats soil i dont know about hydro sorry
Thanks for the help! All good information to have at my disposal. I still run soil too most of the time. This is my fourth attempt at dwc ever. First i pulled 125g off a Tyrone special in 60 days flat. Second i had to ditch. Third was a Tyrone special that failed to produce so i culled it and this one is my fourth.
Oh and its not looking so bad so dont go and do anything drastic. Its prolly better ur not there so u could think about first.
Thanks, and agreed! Sometimes it's worse when you can do too much to the plants! I've done that before!
How long after lights on was this pic taken?
If soon after it is just lighter coloured due to not being hit by light yet. Does not appear deficient imo.
'Carpe diem et fumum veriditas'
I know I replied to this already but for sake of completeness of the thread I do 24 hour lighting, thanks for the help!!!
Looks the same as my last grow!
Turned out that a nitrogen toxicity caused by switching calmag brand and not taking the higher N value into consideration was causing a potassium lockout!! Gave them a good flush, sprayed them with formulex and they all came bouncing back ✌✌
What was your lineup and what were your genetics? I did change the res but if it gets worse I will have to flush and restart. N issues was my very first thought but other way. So I am just a lowly grower of a wonderful plant
