Why does the FC level in my pool rise in the Fall and Winter months? I have a Salt Cell (Salt Water) Pool using an inline Chlorinator

In the Summer months the sun is overhead in the sky

• When the pool water is exposed to direct sunlight, the FC depletes rapidly
• When the pool water is warmer, the FC depletes rapidly
• With multiple bathers in the pool, the FC depletes rapidly

In the Fall and Winter months, the sun is lower in the sky  

• When the pool water is exposed to less direct sunlight, the FC will deplete less rapidly and may begin to rise
• When the pool water is cooler, the FC will deplete less rapidly and may begin to rise
• With fewer bathers in the pool, the FC will deplete less rapidly and may begin to rise

If you have a Salt Water Pool using an inline Chlorinator, remember to do the following at the end of Summer:

• Inline Chlorinators with temperature sensors
  • Inline Chlorinators lower chlorine production when the water temperature dips below 60 degrees and those with temperature sensors cease all production if the water goes under 50 degrees. 
  • This is to keep the unit from working hard to produce chlorine when cool water needs less of it to keep the water clean.
  • Refer to the instructions provided by the manufacturer of your Inline Chlorinator
  • Refer to the FC levels provided by SENSE to monitor FC levels in your pool
• Inline Chlorinators with “Winter Mode”
  • Winter Mode reduces chlorine production to save energy and prevent over-chlorination during colder months when pool usage is low and pool water temperatures are cooler
  • Lower salt chlorine production in Winter Mode is typically enough to maintain water clarity since algae and bacteria do not grow well in cold environments.  Winter Mode is a good way to increase the salt cell’s lifespan.
  • Refer to the instructions provided by the manufacturer of your Inline Chlorinator
  • Refer to the FC levels provided by SENSE to monitor FC levels in your pool
• Inline Chlorinators with “Less/More setting”
  • Inline Chlorinators with a "less/more" setting controls the percentage of the total output capacity.