I have been following TFPC method since I got my pool 1-1/2 years ago. However, it is unclear to me if I need to shock the pool at opening or on any other frequency. I have a salt water pool and I open before it gets very warm. Additiinally, I have the high end Merlin mesh cover that supposedly does not let sun light in. At both openings I have had no algea when ipening and no issues maintating my normal chlorine levels (4-6 ppm). My salt water generator is size for pools up to twice my size and It only needs to run at 40% for about 12 hours per day.
However, after swimming a lot last week I got swimmers ear. It might have just been a cooncidence as no one else in the family got it, but it concerns me that maybe it was possibly due to poor disinfection. Thoughts?