Whats her problem ? Tips and Leaves

This is a potassium problem the feed is a bit low i would up it to around 10ml per gallon. Try that and see if it helps. The manufacturer calls for 4ml per liter but that seems a bit excessive. Make sure that the ph is between 6-6.4 so you don’t have any lockout. Within a week or so i would start pk booster. Should be a quick fix.

This is the beginning of a potassium deficiency here... Check your pH levels, make sure (if you're growing in soil) it's between 6.0 and 6.5 ... and consider giving a PK booster ... she's needing far more potassium than she's getting - either she can't get at what you're already supplying (pH issue) or you're not giving her enough. Good luck...

Could be a lack of potassium (K). Could also be magnesium but you said you're feeding CalMag. I would give her a PK booster if you haven't already.

In my opinion, there is an overfeeding of nitrogen; it's possible that you've fertilized too much or that when watering your plant, you're not watering it enough for the previous fertilizers to wash out, causing a buildup of salts. When you water, do you let the water drain out the bottom? Always water slowly and wait for water to start coming out from the bottom of the pot. This way, you ensure some cleaning of the soil. I feed them once every 7 days; on the other days, I only use water, making sure to let 20/30% of the water drain from the pot. I mention this because you say you'll feed it after 3 days of having fed it. Maybe that's too frequent? I don't know, it's just my observation; I hope you can resolve it. Cheers!

the advanced chart for your nutrients indicates 3 ml per liter... so I would recommend increasing the doses a bit regarding the cal mag you're doing well because in last week's photos a deficiency is visible you have a product that is among the best on the market so it has been studied better than others my advice is to trust the manufacturer and follow the chart madgari you can do one watering with just water and two with fertilization