All shoots yellowed overnight, need help

Blackketch

Well-Known Member
Good morning guys, as I have explained before unfortunately every month I have to spend a few days in the hospital and have to leave my babies unattended and every time some shit happens. This morning we had shitty weather where I live and the power went out about an hour after the lights came on staying 4 and a half hours without light and dehumidifier on. Needless to say the humidity has skyrocketed and even dew has formed and the temperatures have dropped to 19 degrees Celsius, I found them all like this...they are still nice and perky but ALL the shoots are pretty much yellowed and I assure you they were doing quite well last night.
I switched the lights to 12/12 on Tuesday and I'm not so worried about the power failure since it only happened once anyway but still I don't know if this coloring could be from the new shoots that are growing or if I really have to worry about some nutrient blockage or shock.
In the past few days I have been going back and forth and not being able to pay attention to it the plants went without water 2 times just for one day (meaning the day before they were nice and tight and the next day they were floppy) and yesterday was the second time. I watered for the first time with fertilizers with a PPM of 900.
I am using prefertilized soil until the beginning of flowering or at least until I see some leaves start to show signs of deficiency. I use RO water at 0.20 PPM to which I always add Cal/Mag.
How do they look to you? Some photos because of the light do not bring out the discoloration well but I assure you they all have nice green leaves but with almost yellowed tops.
I am very worried guys and I would not want the situation to get worse.
I thank in advance any person who would like to give me some of their time.WhatsApp Image 2022-11-26 at 14.42.37.jpegWhatsApp Image 2022-11-26 at 14.42.47.jpegWhatsApp Image 2022-11-26 at 14.42.52.jpegWhatsApp Image 2022-11-26 at 14.42.54.jpegWhatsApp Image 2022-11-26 at 14.42.56.jpegWhatsApp Image 2022-11-26 at 14.42.58 (1).jpegWhatsApp Image 2022-11-26 at 14.42.58.jpegWhatsApp Image 2022-11-26 at 14.42.59.jpeg
 

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Blackketch

Well-Known Member
@Nope_49595933949 @7CardBud
All right guys, sorry for the panic :oops: We'll see how they behave in the next few days... anyway I immediately thought of normal growth but with all the problems I listed I was getting worried! They looked a little too yellow to me and it was looking like the beginning of an iron deficiency
 

Blackketch

Well-Known Member
Lights too bright. Easy fix .
I have checked the height and dimming of the lamps (led lamps) and they are about 15 inches from the lamps and at 70% dimming, I will try to monitor the situation although honestly the "problem" has resolved itself.. let's just say I panicked too fast for a very normal thing
 

coreywebster

Well-Known Member
Some nutrients are very slow moving, such as iron, so when you flip them or when they are in full speed veg the growth tips often can look like an iron def , mostly the plants catch up with themselves.
 
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