Gestern Abend ist mir aufgefallen, dass die Blätt...

the original drooping was probably just a bit dry... it looks like there's not enough o2 in soil.. in future use more perlite -- 50/50 in soil or peat. I'd wager it recovers as it dries a bit. What are your irrigation practices? you should saturate entire volume with a little runoff waste to be certain. then let top 1" dry. How often you fertilize while doing that is more about how much you feed at one time. many good ways to do it.. every other / every third.. or a low dose every time can work too. as the soil loses nutes you have to fertilize more over time. the twisting is probably form variances in pH in your substrate -- especially if not adhering to previous irrigation practices. dry pockets will wreak havoc on your grow and over time they get worse. A little runoff of 10% will ensure pH stays fairly consistent, excluding microbial causes of shifts. don't try to give it X amount of water... you water to runoff, toss out waste and walk away.. wait for 1" to dry up top, then repeat. if it is droopy for ours after irrigation, you just need more perlite in your soil, or hydroton or vermiculite etc... more tiny air gaps will be present and better drainaige... good mix of what roots need...