Kann mir jemand sagen was ich machen muss ?

Hello there ✌️🍀✌️ You should carefully take it out, rinse with distilled water and repot with a better medium and a bigger, final pot. If my eyes are seeing right, there is alot of sand in that medium. Too much. Do you have access to soil? If so you should get Vigoro soil. It's a blue bag. Then get a 5 gallon pot or bucket, make sure there's drain holes. Repot it. Just feed ph balanced water the first week or two. after and then use nutrients at half strength for a week. Don't water too often, let the soil dry out a bit in between feeds. If you pick up the pot and it feels light, time to feed. Feed them before they droop or dry and curl. Strong light is your final factor so hopefully you have a good source. You'll be just fine if you have all these things! Best of luck growmie ✌️🍀✌️

Use a ph and ec reader to get your feed and substrate in the proper range for the substrate your using. Check your runoff waters ph and ec levels and get them where they need to be.. Cheers