Double Double Grape by Mephisto - Autopot / Coco

After I was really happy that the autopots were finally working, of course, the next scare came right away. In the evening, I noticed a slight calcium deficiency, and then everything happened fast—within two days, the plant turned completely yellow. 💀💀💀 Since I've been fertilizing at EC2 (1000ppm), I started looking for other issues and first recalibrated my devices. The measured pH was exactly on point at 5.6 in the reservoir. Then I thought about root rot, so I let the pot dry out and checked it from underneath. Some very white and healthy root tips were poking out of the holes, and the smell was completely normal—no rotting smell indicating root issues. 😇 So my assumption was, if it's not root rot or a pH problem, then the plants must be hungry. I increased the EC to 2.4 (1200ppm) and hope it recovers. The other plant was nearly over-fertilized at EC2. So, I probably won't be able to feed both plants from the same reservoir anymore. It's a pain. 💩 But other than that, things are going well. 😊 20L Res every 5 days (EC2.4 PH5.8) Lights on 21h at 600ppfd