Whats wrong with these plants?

Calcium, potassium, and possibly even nitrogen deficiencies from the looks of it.

Welche Sorten davon benutzt du z.B.

First, use a CalMag foliar. Next, dial your VPD so you don't run into any more deficiencies. My fertilizer has enough CalMag in it, so I don't need extra.

Beginning of a calcium deficiency. Add a cal/mag supplement to your line up or increase the dosage if already using one. Symptoms may take up to 2 weeks to show improvement, it won't happen in 2-5 days.

Odd, the question you posed 8d ago look like same plants but in the future? LOL the symptoms were more progressed 8 days ago.

Mg deficiency. Ca deficiency is yellowish-brown spots but not interveinal chlorosis. Also, the location helps deduce mg-deficiency, too. IT will affect older and middle aged leaves first. too much or too little K can have similar symptoms, so you'll need to eliminate possibilities. LEaf symptoms are not discrete. They overlap and sometimes it's not even a deficiency but rather lockout from other nutes being too high or ph being off. Diagnosing solely by leaf symptoms increases the probabilty of a wrong diagnosis. Mg deficiency takes 4-6 weeks from inception to show symptoms, so age of plant can help eliminate that. KNowing how much you feed over time will help greatly too. If this is soilless, it should be incredibly obvious which potential cause is at fault by simply looking at your formula. Soil is more of an unknown in that regard, but knowing what you supplement over time will be useful too.

What size container are they in?

Agree, looks like Ca issues, the CaMg part of that is on the bottom of its feed chart. sometimes its missed.

hey 👋 It looks like the beginning of a cal-mag deficiency; if you're using Biobizz at the recommended dose (1 ml/L), double the dose