Leaves dropped over 4h night

I am at 20/4 Light schedule... Growing auto
Extractor fan is off because I read that in the start 2-3 opening tent is enough to air exchange...
Plant is 15 day old.. The clip fan is on and direct on plant because couple days before when I open tent I see droplets of water on leaves after the night period without any ventilation..
Today I opened tent and Omg... I think I lost her... Symptoms are like over water but that can't be because I saw her 10 min before night period and she was healthy and ok and I didn't water couple days so definitely is not over water just symptoms like that...
New shoot seems to be good but fan leaves that drop over night didn't recover very quickly as I think after 10h of lights now... They recovered but they aren't like they are prior to night..


Can you please please help me out what couse this... reading symptoms like this and only clue is that have to do something with transpiration and don't know what I have to do
Or that clip fan that is on when lights are off is the problem... But I think that is good for strength the stem for young plant

Temp.. ON-23.OFF - 18
HUMIDITY 70-75% all the time

pollen205 said:

I am at 20/4 Light schedule... Growing auto
Extractor fan is off because I read that in the start 2-3 opening tent is enough to air exchange...
Plant is 15 day old.. The clip fan is on and direct on plant because couple days before when I open tent I see droplets of water on leaves after the night period without any ventilation..
Today I opened tent and Omg... I think I lost her... Symptoms are like over water but that can't be because I saw her 10 min before night period and she was healthy and ok and I didn't water couple days so definitely is not over water just symptoms like that...
New shoot seems to be good but fan leaves that drop over night didn't recover very quickly as I think after 10h of lights now... They recovered but they aren't like they are prior to night..


Can you please please help me out what couse this... reading symptoms like this and only clue is that have to do something with transpiration and don't know what I have to do
Or that clip fan that is on when lights are off is the problem... But I think that is good for strength the stem for young plant

Temp.. ON-23.OFF - 18
HUMIDITY 70-75% all the time

Click to expand...

Pic please

It sounds like they're/were drowning. Sometimes the effects don't show for a couple of days. Especially since your RH is so high. Your plants probably can't get rid of the excess water especially with water all over them. Lift your pot and see how heavy it is. If your fan leaves aren't smooth and are bulging and drooping, it's because of too much water the vast majority of the time.