I am researching salt water generators for my 12000 gal pool. I understand over-sizing the system and i have read that you should do it 1.5-3 times the pool size. I was thinking of CompuPool systems that come in 24,36,48 sizes. They are rated on amount of cl produced per day but is that running 24 hrs/day? What sized do you suggest and how long (avg load in home pool) would you have to run it per day?