Last year we finally upgraded our 12x24 Intex Ultra pump and sand filter to much bigger versions. This year it's time to upgrade the saltwater generator. The only recommendation I've seen so far is the Circupool SJ-20 for $800. We have SO much money invested in this pool by now (excavation, pump, filter, deck, skimmer, electrical, etc) that I'm hoping there is another (cheaper) option. Any other brands? Who has upgraded and what did you use? The Intex has never done a good job at producing chlorine. Our pool is about 8400 gal. In coastal AL we need something better, especially when we leave town in the summer and aren't home to supplement with liquid chlorine. Help, please!