Honestly I am not surprised and I am not surprised that it only had half a million visitors and that includes those who
signed up for membership of the gym and sport teams that have used it.
Yes the Dublin 15 is a big area and has no other swimming pool you think there would be more local people using it and school having swimming classes organised for children. It could have families going there every weekend teaching their children how to swim but lets face it most families will not be able to afford the price of the 40 euros family pass every week. It is not the price alone, the fact that it is that much means people will try and make the most of it and children will put pressure to eat in the heavily sponsored food venues and the fact that there are M&M statues everywhere is off putting to parents again.
If the family pass more reasonable or was not an all day pass say 3 hours for somewhere between 20 and 30 euro they would get a lot more people in the door on a regular bases. For as it stands D15 does not have a public swimming pool.