A lot happened this week. Plant moved to different tents twice, first to a 40x40cm tent which the plant outgrew in like 2 days.
I also realized in this week that I horribly underestimated the root growth and water consumption. I quickly went to the hardware store and got myself a bigger container, 15 liters this time. This reservoir will also turn out to be way too small.
This is also the first time I got worried about my roots due to discoloration and the color of the nutrient solution. I started regularly cleaning the roots with hydrogenperoxide at this point. Looking back, this was likely a combination of dead roots from transferring, nutrient discoloration and early stages of root rot.