Added a little more ventilation: open tent + 30W fan in front of it.
Going to order a decent fan for flowering replacing my four tiny PC fans the beginning of next month when there's money for it.
Transplant to around 10 liters for the big one and 7.5 liters for the small one.
Using Plagron Grow Mix with (a little bit of) perlite. Will definitely add another 1.5-2 liters of perlite to the Plagron mix the next grow.
Both plants got slighty stressed by transplanting, but after 36 hours both were looking fine again.
Not much development on the little one.
Big one is doing great.
Any ideas on the bright/yellowish tips?
Nute-burn is unlikely since I did just feed pure water to that point.
Maybe light burn? Moved the lights around 5 cm higher.
My tap water is around 7.2 pH