Chlorine Jump?

mayberry32

Silver Supporter
Jun 24, 2019
226
Watkinsville, GA
New vinyl lined pool went in a month or two and I've learned a lot about the chemistry. Using the TF100 kit, I've figured out what is needed, and much of how the chemicals affect one another. My numbers are still okay, but the weather cooled off over the past few weeks and water temp is down to 66-68. My chlorine has jumped to 11 (up from 4). I cut my IC60 SWCG back to 10% (from 40%), and it dropped to 8, and then went back up to 9 yesterday. So, last night, I dropped the SWCG back to 5%, hoping that will lower the chlorine. We have a lot of rain in the forecast over the next week or so, so we won't be getting much sun to kill off the chlorine. Is this okay, and normal, during the colder months, or could there be another reason, or something I should be doing?
 
32,

Sounds pretty normal to me.. As the water gets colder and the sun light gets less intense, you should expect your chlorine demand to go way down.

It won't be long before the SWCG will shut off due to cold water (about 52 degrees) and you will need to start using Liquid Chlorine. The good news is that it does not take much chlorine in the winter..

Thanks,

Jim R.
 
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