Would less sunlight in the fall cause chlorine levels to rise? (Saltwater pool)
First summer with our saltwater pool so I have been learning a ton about how everything works! Located in northeast US.
All summer, our free and total chlorine levels were great (they are always about the same, and usually floated around 2 ppm with our salt cell at 50% output).
Lately, I've noticed the chlorine levels have been climbing slowly (they're at about 5ppm now) while all other levels have remained constant (pH, cya, alkalinity, etc).
I think i know the answer, but could less sunlight be the primary cause of this? Do folks with saltwater pools find that they need to turn their salt cell output down as the days get shorter and less sunlight is available?
Not only is the sun rising later and setting earlier, but because the sun is getting "lower" in the sky in my region, it is now blocked by more trees compared to the middle of summer, where we get direct sun about 10 hours/day.
I've researched this and know that UV light "burns off" chlorine, but i couldnt find anything about whether it has to be direct sunlight or not, and whether folks often need to adjust their salt cells to compensate for changing sunlight patterns throughout the season.
Also, I know that 5 ppm chlorine isnt crazy high. But it is a big change from the consistent levels we had all summer and im just trying to learn as much as I can about all of this!
Thanks y'all!