Warko It's turning a bit yellow, at first I thought it was magnesium, but most likely it's lacking potassium, there's too much light, the plant drinks and eats well, and the pH is stable. There's a slight overwatering visible (the tips of the leaves have lifted up), it's hard to find the right watering schedule with coco, I was doing 20 minutes every four hours and that's too much. I need to finish the aeration, the roots are getting too little oxygen.