I'm in Gilbert, AZ so I'm familiar with the sun eating up chlorine pretty rapidly. My CYA is around 50-60 right now, I left for California last Wednesday and put 4 gallons of 10% liquid chlorine in on that Tuesday evening, today when I tested I was at 1ppm Cl. We also has a big dust storm while I was away but I came home to a crystal clear pool. I always store my liquid chlorine or bleach inside where it's cooler (78 degrees). I buy 4 gallons at a time and they last me about 2 weeks.

Oh and I'm also having to add muriatic acid ever so often but my fill water has very high pH, so you have to figure that into everything as well.

Where are you buying your liquid chlorine?