What do I have to bring to access the 25 m pool?

A swimsuit.
A towel and/or bathrobe – personal or can be rented on site (towel rental € 4, bathrobe rental € 8).
Pool slip-ons – personal or available on site € 9.90.
A cap – personal or available on site (€ 3 cloth cap, € 9 silicone cap).