I noticed that most strips and lower-priced test kits show 1-3ppm of Free Chlorine as the ideal level.
But according to this forum this is not accurate (FC as a factor of CYA, among other things) .
So where can I read about the study/evidence that supports this?
And how new is this "second school of thought"?
I'm really puzzled that the FDA (I think) has a recommendation that is outdated, as well as the test kits.
Thanks in advance!
But according to this forum this is not accurate (FC as a factor of CYA, among other things) .
So where can I read about the study/evidence that supports this?
And how new is this "second school of thought"?
I'm really puzzled that the FDA (I think) has a recommendation that is outdated, as well as the test kits.
Thanks in advance!