I am really puzzled. I tested today for the first time in a while (about 5 weeks), since no one is swimming these days. My CL tested at about 28, but when I checked the salt reading on the AquaPure, it was showing that I was low on salt. I had been running the AP on 45%, but I just lowered it to 15% to see if I could bring the CL down. What do the experts recommend? We won't be swimming again until spring and won't be draining the pool.