I was checking my pool numbers and noticed by FC has dropped down to 2ppm, about 3 months ago I shut the SWG off (first winter with the SWG) and threw two pucks in the floater (I'm only at 50 CYA). I usually do this every winter(add 2 pucks) so I dont have to mess with the pool, the pucks are gone and I went threw the Pool Pilot Manual about a minimum "safe" operating temp, I couldn't find one, my question is can I turn my SWG on with my water at 47? I run my pump about 2 hrs a day, I was thinking about putting the Digi on boost cycle to gets some clorine in the water?