Big surprise on sunday: I f*cked up :)))
Looking back, I had multiple problems. First of all, I woke up to one of the air tubes having popped of. The 3D printed net pot exploded last week and littered the reservoir with badly rinsed hydroton and I still had an algae problem.
This resulted in not-so-nicely-colored roots and a wayyyyy to high pH basically causing a full nutrient lockout.
At this point I too realized that the citric acid solution is basically useless as after an hour the pH was back to the original value if not higher.
The plant recovered during the week after I applied the following fixes:
- attached a rope ratchet from the stem to the tent roof and lifted the plant, installed a collar so the original net pot containing the rockwool sits about 2,5cm above the reservoir
- fully cleaned reservoir and roots from hydrotone and plastic scraps with h2o2
- started using king crab bennies
- started using a real 3 part pH down solution instead of goddamn citric acid