I have been trying to get my CC below .5 I have shocked with Cl numerous times by going to 12 ppm (CYA 30) according to my calculations. I just couldn't get it down to "0".
Well, today I used that special FAS/DPD chlorine test kit from TFtest kits. Guess what, after adding what I had calculated to be the appropriate liquid Cl to get to 12 ppm, I checked
it and found my FC was only 10. I decided to add more liquid chlorine to get FC above 12. Added 2 more oz and waited 5 minutes with everything running and got FC 13 and 0 CC.
Is it possible I had never been getting my SLAM over 10 and consequently never got rid of the traces of CC?
Well, today I used that special FAS/DPD chlorine test kit from TFtest kits. Guess what, after adding what I had calculated to be the appropriate liquid Cl to get to 12 ppm, I checked
it and found my FC was only 10. I decided to add more liquid chlorine to get FC above 12. Added 2 more oz and waited 5 minutes with everything running and got FC 13 and 0 CC.
Is it possible I had never been getting my SLAM over 10 and consequently never got rid of the traces of CC?