Just looking at the info in your sig and comparing to my pool, I know every pool is different, but we have about the same volume of water. You have to the ic60 and me the 40. Im currently running at 80% and about 10 hours per day. At the advice of a someone here I changed my timer to run during the middle of the day when my pool get the most sun and I've been holding at FC 6.5 for a few days now. I'm decreasing my timer again in a couple of days and monitoring the FC in an attempt to fine turn my swg timing. I see your pump is 1/2 hp smaller, than mine so perhaps that's a place to start if your goal is to decrease run time. I'm also raising my cya up to the 70-80 ppm range, not there yet but holding FC 6.5. I'm a new 1st time pool owner so take what I say with a grain of salt...just an observation.
quote]=Philo;1047270]I run my SWG at 100%. If my FC goes up or down when I check it weekly, I adjust the the time the SWG is running. Currently, it runs at 12 hours per day to maintain 6ppm. My CYA is 60-70 ppm.
Is there a scientific way to predict how much time I could reduce the SWG to maintain the FC levels if I raise the CYA to 80 ppm?[/QUOTE]