We live in Fl.Our pool is in a screened cage.I know the screen cuts back the sunlight.Our pool is in sunlight for about 5hrs a day.Would we go on the low side of the recomended CYA level or the high side or does it matter.We will be going salt as soon as our pool has gone its 30 day cure.We are going to use the pool pilot total control system which calls for a 30-50ppm CYA level.What do you think?