Is it normal that my chlorine drops from 5ppm to 1 ppm everyone 24 hours. We only have 2-3 bathers for about an hour. We do get a lot of sunshine however. Does alkalinity affect chlorine? Last time I checked it was about 85. Im using about 2.5 chlorine jugs (3.6L 10.8% chlorine ) per week. My CYA is 48. pH at 7.6-7.8.