Ich habe eine Frage, wie kann man wasser in den pool hineinfüllen, weil ich gerade selber ein schwimmbad baue.

Looks like a good mod with balanced stats, which is the most important thing. As a biologist, I would suggest you replace the grass near the pool with ceramic tile to be more realistic. The chlorine (or whatever anti-bacterial agent) from the pool would kill the grass, and eventually the trees. Tile would prevent the first problem and reduce the second problem. It would look more realistic (at least to me!)

maybe i make another variation with palm trees and stuff ;) lets see

I use this one. but if there is a chance that you can remove the trees or replace it with palms or coconut, That would be more appealing :)

freut mich wenns dir gefällt! weiter so, echt cool dein Freibad!

Gute Arbeit! Diese Version hat sogar Toiletten/Umkleideräume, die ich selbst bald zum Original hinzufügen wollte, schöne Arbeit, weiter so! :)