Hello,

Well the day after returning home I decided to shock since my FC was 5.5 and CC=0.5.
I did leave the pool uncovered but cc did not go away. I added 1 quart of bleach that evening and took the FC up to about 15. I left it uncovered.
My CC did go to 0 the following morning.
Upon testing this evening though, my FC is 5.5 and CC is back up to 0.5. There has been no swimming. Just wondering why the CC is up again. I know I was told that it was not necessary to shock with a CC of 0.5 or less. I was worried it might get away on me so decided to shock the pool. However, to do it again would probably have the same outcome??
Any ideas on what I should do or just leave it at this point. My PH is currently 7.4.
Prior to leaving My CC was consistently 0.

As always. Thanks!