After i was a little too caring at the beginning and i was a little worried about the rather low humidity in the small pots, i made my first mistake.
I bought a humidifier and set it so that the humidity is around 50%, but I didn't realize that the humidity is much higher when the light is off. As a result, the humidifier ran permanently (no automatic control) and raised the humidity in the tent to 99% while the exhaust air was switched off (from now on the exhaust air will run at a minimum of 20%) :D
The tent was completely under water and i was glad that my apartment didn't burn down.
But learning by doing ... i guess ...
However, everything was less bad than it looked at the beginning. I repotted from the small pots into 23l and within 1-2 days there was already an improvement.
From now on, I try to water only half a liter of water per pot every 3-4 days and otherwise leave the plants alone (apart from sitting next to the tent on the floor, watching them grow) :D
The one plant that is in the smaller pot i want to tie down to try a little with LST.
Just excited seeing them grow in height and recovering from repotting and high humidity.
@AutoflowersSucK, Because of the hanging leaves?
In the first 4 pictures they were very stressed from the DHL trip and from my humidifier fail. I took the last pictures today just before watering. I've generally made sure to give them enough water, but not too much.