Is chlorine just broken down by direct sunlight or does heat also break it down? In an indoor pool would you need to use any CYA? This is just a theoretical question. I don't have an indoor pool and keep the CYA level in my pool at about 40. I'm just curious.
Chlorine, sunlight, heat and CYA
- Thread starter TomAtlanta
- Start date
- May 3, 2014
- 58,428
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
- Mar 5, 2020
- 3,034
- Pool Size
- 66000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Astral Viron V35
Main chlorine loss in residential outdoor pools is by UV.
Apart from that, chlorine is always oxidising stuff, getting spent in the process. All chemical reactions speed up with temperature, and therefore one would lose more FC via this path in warmer water. This applies to indoor pools as well.
We recommend a little CYA in residential indoor pools for its chlorine buffering effect. Like that you can maintain a few ppm FC to have enough when you need it, without creating chlorine soup.
Apart from that, chlorine is always oxidising stuff, getting spent in the process. All chemical reactions speed up with temperature, and therefore one would lose more FC via this path in warmer water. This applies to indoor pools as well.
We recommend a little CYA in residential indoor pools for its chlorine buffering effect. Like that you can maintain a few ppm FC to have enough when you need it, without creating chlorine soup.