There are not much swimming pools in Heilbronn. There are the public swimming pool which is next to Wertwiesenpark, and there is Soleo, in the Neckarmeile.
Soleo has one main swimming pool, one for kids, a jacuzzi and a warmer swimming pool outside the building.
Soleo charges per visit, or they also offer a package of around 10 visits for a reduced priced, which is better than just paying for a longer single visit.
It is one of those places in Heilbronn that you would like to go outside your daily routine.