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Thank you everyone for your help I really appreciate it. I will wait a few days with the adjustments I made to see what happens

Yes, they are, if I follow the recommended dose it will get at 1600ppm. The sweet spot I found is around half dose between 650 and 900 on flowering

I don't have much space, I will wait a couple of days to see what happens

There are 4 plants there (it's hard to tell from the photo, sorry I didn't mentioned before). The one in the top left is the one having the problem, not sure if you are talking about the left at the bottom (I had some calcium deficiency a month ago due to low PH because the pen wasn't...

I just took a photo now, the photos I added 2 days ago where from the plant with the blue arrow, it's like 70% recovered. The other one it's pretty much the same, maybe a bit better

Yes, I've been checking this every day.

I checked a few days ago with the magnifier and I didn't see anything, I can check again later

Ahh, that happened during the LST

They might be a bit cold but I think the problem happened because I had very low humidity around 25% and the temp 22-23°c

I was searching for some charts about the VPD and I found this. Looks like the plants were in the dangerous zone for a while

I added an extra light, you are right it could also added extra stress.

What do you mean?

I can go up to 25°c, and I have a humidifier that works fine. I am lowering the temperature to see if they recover a bit, I can increase it later. Do you also think they are dehydrated due to the low humidity?

No way, I am not going to increase the RH to 60 in flowering, and the temperature to 27°? Why? It looks like dehydrated

On top of the canopy I saw 24°c. I saw a small improvement in 1 of them, the other still the same. The leaves are dropped but also have the taco shape. Do you know how long does it take to recover?

Hi guys, I am having a weird problem with the leaves, and I will need some help. The water temperature is around 20°c, lights around 16 inches, CO2 between 800 and 1200 ppm (I have the furnace close), air temperature 22°c, TDS around 800-900ppm, PH 6.0-6.2. I notice the RH was 25% and the...