I'm starting a new thread here based on this quote taken from the "Chlorine odor at start up of filter pump" thread in Just Getting Started.Originally Posted by JasonLion
I am testing daily and keeping my chlorine around 8-9 based on cya of 70. I missed 2 days because I worked and then got an overtime shift. I work 24 hour shifts, so I was gone for 48 hours. my last test before I left was fc=6.5 (first test with fas-ddp) so I added enough chlorine to give me around 8ppm. when I returned today, chlorine was 5.5 and I had .5 (well probably less because it wasn't really pink...) CC's. it definitely changed the clear fas-ddp test color, and it definitely got clearer when I added one drop of the CC test reagent, but it wasn't bright pink either. anyway, this worried me a little because I thought maybe I was getting algae. I added ~98oz of chlorine which should have put me a little above 9ppm. I tested about an hour later and I was right at 9.5 or 10ppm, kind of hard to tell if it took 19 or 20 drops. the CC test was now 0.
so that was a long story but what piqued my interest was this quote that says low FC can result in small amounts of CC. is there any reference or explanation for this? just curious. thanks.