FC holding steady without running SWG - is this normal?

[*JLS*]

I know it seems like a good thing that my FC is not dropping, but I'm just curious if this sounds right.

My pool is in direct sunlight most of the day. I tested FC 3 days ago and it was 9 with CYA at 60. I turned the SWG off because I'm aiming for FC of 5. SWG has not been running for 3 days and my FC today is only showing 8.5. Could the stabilizer just be holding my levels steady that well?

I'm certain that I'm performing the test (with TF-100) correctly and I do not use any other form chlorine. Am I missing something or does this seem normal? Or am I just overthinking this?

 

[Azgirl71]

Mine took almost a week to drop after my SLAM.

 

[pooldv]

It will start dropping soon enough.

 

[JasonLion]

Over 3 days with CYA at 60, no that is not plausible. How sure are you that the SWG is actually turned off? Or perhaps someone else is adding chlorine?

 

[Divin Dave]

What has the weather been like? Any clouds? And yes, the CYA will definitely show down the FC burn.
the weather isnt super hot yet with lots of UV yet like it will be in July

 

[*JLS*]

Well today my husband confesses "Oh wait, I think I did turn it on for a few hours a couple of days ago."�� I knew something wasn't right because we've barely had a cloud in the sky for weeks now.

I tested again just now and it's down to 7.5

Thanks everyone for the input. I'll drill my husband a little better before I post next time. Haha

 

[n240sxguy]

Haha. That funny right there. At least he didn't add a bottle of algaecide or some other silly pool store magic potion.


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