Hello, I have an above ground 24ft round pool that is approximately 15 years old. We have always used the poolfrog chlorine system and my pool store is trying to steer me towards Pristine Blue. I am ready to do something different that the poolfrog so I have uninstalled the bacpac and mineral pac reservoir. The pool store tested the water last week and said to shock it with turbo shock 2 bags, and raise the alkalinity 10lb bag. So I did that and retested yesterday and they said to pour a whole bottle of phosphate remover and then a day later test and start pristine blue. After reading some of the forum entries on here, I am hesitant about starting the pristine blue. Any help would be appreciated. I do have a Taylor test kit.