49th day:
In - 620 ppm
Out - 370 ppm
The Nurse was ok, but then I saw a few dots on three leafs - a lack of feeding. So I started give a little bit more (as u can see higher). All in all it's fine. Buds are getting bigger. Not that fast, because of my experiments with feeding, but i'm satisfied enough. Still searching for the best way to feed her in 7.5 L coco