Pool was doing great on the BBB method. Now for the last week it will not hold chlorine. I have shocked it repeatedly but when I check in a few hours, it has dropped 1/2 or more of the FC. I have crystal clear water but I don't like testing in the morning and having an FC of 0. Forgot to add, have been shocking to a level of 10 to 12. (following chart)
Any ideas or suggestions?
Here are my levels as of 4pm today:
CC 1.0 (was a .5 until I had to repeatedly shock)
ALK 150 (has gone up since shocking, was 125)
CYA 15-20 (this has not changed much)
using a Taylor K-2006 to do the testing.
We are pretty high temps this week but this started before the high temps got here.
Thanks for any help. I am cleaning the store out of bleach trying to keep up with my FC.