Monitoring CCs

thunderkyss

Well-known member
Jul 24, 2010
174
Pt. Arthur, TX
I've never owned/cared for a pool. Just trying to get a little more understanding.

I understand the math involved in the FC/CYA ratio chart.

But has anyone ever experimented with reducing the FC at a constant CYA to find the break over point of when CCs will start to form?

For instance, according to the chart, if I were to maintain a CYA of 30, my minimum FC would be 2. Does that mean I'll start to see CCs at two, or does that mean CCs shouldn't be present, if everything else is balanced?

Is my pool safe, as long as the CCs don't go over .5? Should I not allow anyone to swim in a pool with the CCs over .5?

Last question (for now), does the smell start at .5, or is it much higher? Basically, if I can smell chlorine, should I be swimming in that pool?
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
You are making an incorrect assumption somewhere. CC is not a reliable indicator of problems. Of to put that more plainly, when you have CC you have a problem, but you can have a problem and not have any CC. Likewise, a bad smell is an indicator of a problem, but a lack of smell doesn't prove that the pool is safe. Nor does the small correspond very well to the CC level. You can have a bad smell and have lots of CC, or none.

So,
thunderkyss said:
experimented with reducing the FC at a constant CYA to find the break over point of when CCs will start to form
doesn't make any sense, because there will be problems eventually as you lower the FC level, but there is no reason to believe that those problems will bring an elevated CC level.

Swimming is fine as long as the FC level is between the minimum and shock level for your CYA level, CC is 0.5 or lower, the water is clear, PH is between 7.2 and 7.8, and there is no obvious organic contamination.
 

thunderkyss

Well-known member
Jul 24, 2010
174
Pt. Arthur, TX
JasonLion said:
You are making an incorrect assumption somewhere.
I don't doubt that at all.
JasonLion said:
CC is not a reliable indicator of problems. Of to put that more plainly, when you have CC you have a problem, but you can have a problem and not have any CC. Likewise, a bad smell is an indicator of a problem, but a lack of smell doesn't prove that the pool is safe. Nor does the small correspond very well to the CC level. You can have a bad smell and have lots of CC, or none.

So,
thunderkyss said:
experimented with reducing the FC at a constant CYA to find the break over point of when CCs will start to form
doesn't make any sense, because there will be problems eventually as you lower the FC level, but there is no reason to believe that those problems will bring an elevated CC level.

Swimming is fine as long as the FC level is between the minimum and shock level for your CYA level, CC is 0.5 or lower, the water is clear, PH is between 7.2 and 7.8, and there is no obvious organic contamination.
Thanks.
 

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