Jandy SWCG's "optimal" water conditions: why raise CYA?

[waterbear]

So, Cya of 30 and FC-1.5, running a SWCG/DE Filter 12hours a day on 50% isn't necessary?
I should raise CYA to 60 and FC of 3 with less time on the cell?

I must say this is a great forum...

NO, you should raise it to 80 and maintain the FC at 4 ppm. The difference between 60 ppm and 80 ppm has been determined to be significant and directly translates into better pH stability in a salt pool.