You were right about the strips. I have a pretty good drop test kit that I use at home. When I tested my chlorine when I got home it was reading about 5. Do you think there test was also off because the water had been sitting in my car all day in 95 degree heat? I just mainly wanted to get the CYA reading but now I wonder how accurate it even is. Also, do you think I should go back to just using bleach for chlorine and only use the feeder when I am going to be out of town? I had been turning my pump off about 12 hours a day but it seems that when I do that I either get cloudy water or a small algae bloom. I have no idea what my electric bill will be running the pump 24/7 but I'd rather have that than a pool full of algae that won't go away. I am looking into a newer pump that uses less amps (mine uses 13.8 and is very old). I would like to get a 2-speed but that's a whole other thread. Thanks again, Penny