How old were your Teens when they stopped using your pool?
We currently have a pool that our 8 and 10 yr are in constantly. From talking to other parents, it seems that there comes an age in the teen years that the kids lose interest in the pool and move on to other activities - leaving dad to maintain a pool that rarely gets used.
Did you have this experience and if so, how old were your kids? We're in Syracuse NY where the summers are hot but the swimming season is pretty short.