I am converting our pool to an SWG. After much time on this forum and its recommendations and reviews, I have narrowed it down to CircuPool. I have a 17-18k gallon pool south facing in the Central Florida sun/heat. My choices are between the CircuPool RJ-45 PLUS and the RJ-60 PLUS. Is the RJ-60 overkill? Will running the 60 extend the cell life since it won't be working as hard? WIll it produce too much chlorine at lower levels? Isn't bigger better? What would the negatives be? Any help and advice would be much appreciated by this new pool owner.