The project of two tents changed to one, because not all the seedlings survived. The rest looks good, but the pheno variation is noticeable even at the beginning. I hope at least half would be females. The temperature of the nutrient solution rose to 24 degrees Celsius, so I built a suitable housing for the air pump in the window vent. It's -2 degrees Celsius outside, I'm sure it stays cool and at the same time I can raise the temperature of the room to the optimum.