I'm intending to bring my LO for a swim at normal swimming pool. Is there anything I should take note? She will be 4 months old next month. What type of swimming diaper should I get?

I brought my Lo when she is 4mth+. Was initially worried about her skin having reaction to the chlorine water and if she drinks etc but it turns out fine. We bring her weekly to the condo Swimming pool. She loves it. The advice is to get a baby float and either a swim suit or Swimming diaper (that would not absorb water in the pool); also Rem your towels so that your lo don't get a cold. FYI we use goon swim diapers but you can get the reuseable ones. We didn't want her to catch cold so got her a swimsuit instead.