Are my numbers OK or should I adjust them?

triplets&quads

LifeTime Supporter
May 29, 2008
79
0
North Carolina
#1
I am a new member to this forum and to the BBB and SWG. I have a 15,300 gal ABG with a new liner and new water and I am using the TF100 Kit. Here are my numbers:

Yesterday's Numbers

FC 3.5
CC 0
TC 3.5
PH 7.2
TA 100
CYA 70

Today's Numbers

FC 5
CC .5
TC 5.5
PH 7.5
TA 110
CYA 70

My SWG was running at 40% for 10 hours. I just realized today I had the timer set wrong, so that has been corrected. There has been a steady rain today. Do I need to adjust anything besides my SWG? and what causes CC?
 

JasonLion

LifeTime Supporter
Platinum Supporter
TFP Expert
May 7, 2007
37,879
5
Silver Spring, MD
#2
Your numbers look fairly good. You probably want to allow TA to fall to the 60 to 80 range. That will slow the rate of PH increase.

CC is formed when chlorine has partially broken down some organic contaminate. Eventually with continued reasonable chlorine levels it will break down further and go away. CC at 0.5 or lower is not normally a problem.
 

triplets&quads

LifeTime Supporter
May 29, 2008
79
0
North Carolina
#3
Thank you Jason!

I have been using your poolcalculator to balance my pool and it was a great help! I am not going back to the pool store. I did that for 10 years and I have had to replace my liner twice already. I hope this new one will last a long time with the help of this forum. Thank you for replying, Nancy
 

AnnaK

LifeTime Supporter
Platinum Supporter
TFP Expert
#4
CC stands for combined chlorine. Free (available) chlorine + combined (used) chlorine = total chlorine.

The fact that you got a CC reading may well be due to the rain which can carry all sorts of contaminants and dump them into our pools. In rural Pennsylvania right now it's fertilizer and dust from tilling and planting.