Hi, I'm new to this forum. It looks like a great place and I'm hoping to learn a lot here. I had a problem with my Auto Pilot system last year. My pool is a 60' x 40' gunite pool with 2 Auto Pilot Dig-220 with Supercell SC-48 as my generation system. It has been working fine for the last 7+ years. Last year I could not keep the water clear. The chlorine was always low. I think there is a problem with my generation system but I don't know if it is the cells or the Dig-220's. Has anybody had this experience? Where should I start my troubleshooting? My location is in New York just north of Manhattan, The cover will be coming off soon so any advice would be a big help.