Is this possible, Pool store said...

[CGS]

My FC is 2.4 and my TC is 0.1. How is that possible. I thought that TC is CC+FC!?!

Also of note

ph 7.4
CYA 16
AK 19

 

[MikeInTN]

No, that's not possible. You've got it right, FC + CC = TC.

 

[CGS]

My printout actual says that I have -2.4 CC. I even asked about it and I didn't get an answer. Something about being gased out.

 

[Guest]

My printout actual says that I have -2.4 CC. I even asked about it and I didn't get an answer. Something about being gased out.

Only thing "gassed out" is the mind of the pool store employee who told you that! This is CLEARLY an example of testing error or you actually have a very high chlorine level that is bleaching out the DPD test. Test with OTO (turns yellow) and if the color is darker than bright yellow (orange, brown, or reddish after standing a few minutes) then you have very high chlorine levels and the DPD test they did (or the strips) are bleaching out!

 

[chem geek]

Only thing "gassed out" is the mind of the pool store employee who told you that!

I spit out my drink laughing at that one! :lol: :compress: :-D

 

[Guest]

Only thing "gassed out" is the mind of the pool store employee who told you that!

I spit out my drink laughing at that one! :lol: :compress: :-D

What can I say. I am a product of the '60's! :fro: :colors:

 

[CGS]

How high does the chlorine level need to be in order to skew results like that?

 

[JasonLion]

DPD starts to bleach out a bit above 10 ppm (higher when used with dilution).