

More then 5cm inward bend normal?
Hi everyone, I’m setting up an Intex 2x3 m frame pool and noticed the sides bend inward quite a lot while filling. I’ve read that some inward bending is normal during setup, but is it normal for it to bend this much? The pool is about halfway full right now, and the sides still look pretty strongly curved inward in the middle, round about 5cm or a little bit more. Does this usually straighten out once it’s fuller, or does this look like a problem with the setup?
Im asking because I bought this used, and I never had one. So I don't now if this is something I should be worried about, or maybe some defects.
Thanks, and have a nice evening!