Im sure this is probably common knowledge, but why are SWG pools recommended to keep CYA so high, and thus your FC level so high as compared to non-swg pools?
SWG CYA question
- Thread starter Yev
- Start date
Layman's explanation from what I seem to remember reading in threads.
Because the SWG puts out small amounts for a longer period, helps protect chlorine. Particularly during the heat / UV during the middle of the day.
Past experience has shown that SWG's fare better with higher CYA.
And? See what experts say lol.
Because the SWG puts out small amounts for a longer period, helps protect chlorine. Particularly during the heat / UV during the middle of the day.
Past experience has shown that SWG's fare better with higher CYA.
And? See what experts say lol.
- May 3, 2014
- 58,656
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
CYA Chlorine Relationship - Further Reading
www.troublefreepool.com
Take a read through the above. For more detail, dive into the references at the bottom of the Wiki page.
Although CYA is recommended higher, if you look at the corresponding CYA/FC levels on the chart at Chlorine/ CYA Chart, the FC min and targets are actually lower then their non-swcg counterparts, because through research the TF team has found that a little bit lower FC level is OK with an SWCG as far as algae goes.
How I understand it is technically, you can still keep your CYA lower* or near the same level as a non-swcg pool (*not recommended), but your swcg may have trouble keeping up with the demand due to bather load and/or UV consumption of FC. If you are ok with running your pump longer and your swcg at 100% all the time and a higher electric bill with shorter SWCG life, there are no issues with a lower CYA as long as your FC is always at least at the minimum level corresponding with your CYA.
How I understand it is technically, you can still keep your CYA lower* or near the same level as a non-swcg pool (*not recommended), but your swcg may have trouble keeping up with the demand due to bather load and/or UV consumption of FC. If you are ok with running your pump longer and your swcg at 100% all the time and a higher electric bill with shorter SWCG life, there are no issues with a lower CYA as long as your FC is always at least at the minimum level corresponding with your CYA.
Yev,
Not sure why you think the SWCG pools use higher FC levels when the opposite is true... See this chart.. FC/CYA Levels
For a non-saltwater pool a CYA of 70 requires an FC of about 9, while in a saltwater pool, a CYA of 70 requires an FC of 5..
Thanks,
Jim R.
Not sure why you think the SWCG pools use higher FC levels when the opposite is true... See this chart.. FC/CYA Levels
For a non-saltwater pool a CYA of 70 requires an FC of about 9, while in a saltwater pool, a CYA of 70 requires an FC of 5..
Thanks,
Jim R.
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