Swimming pool near mellieha

We are new to Malta and looking for out door swimming pools we can take our young children to as well all dislike the beach can anyone help please preferably free as with 4 children and 2 adults the money mounts up

Most of the hotels will let you use their pool at a small charge,& there are a few in mellieha.

Have you tried Charlie's Bar.  €3 each. https://goo.gl/maps/FNBt7VfDseC2 Dropped pin
near Hasira, Il-Mellieħa, Malta