How pink is pink when reading CC

Adamphotoman

Well-known member
Aug 18, 2018
256
Dieppe New Brunswick
Sometimes the DPD reagent #3 gives a very slight pink. Other times it is more pronounced but regardless 1 drop of R-0871 always clears it up.
Obviously there is less CC or more CC but always 1 drop.
 

Dirk

Gold Supporter
TFP Guide
Nov 12, 2017
6,150
Central California
I know what you mean. Technically the test result is determined by when the color disappears, not how vivid that color was before it does. But in my head, the lighter the pink the less I worry about CC! Regardless, if you never use more than one drop to get to clear, that's 0.5 or less and not something to address. But I like to see clear from the start, so if I see any pink at all, I'll test CC a little more often than I would otherwise. Pink is telling me that it might be just something that happened in my water that morning, or is something to keep an eye on (which I then will). It seems to be about 50-50 in my pool. Half the time I get no pink, half the time a get a faint pink. I've only needed an extra drop one time (so that was a 1.0 day).
 

Adamphotoman

Well-known member
Aug 18, 2018
256
Dieppe New Brunswick
Yes, and I keep the pool covered until swim time. So I have to lift the cover to get a sample to test. If it was very very very faint I will call it CC 0. If it was quite pink I will call it CC.05