Quote Originally Posted by PoolDoc View Post
Ah-h-h. The downside of autofill units!

I think you need to fix the leak, get fresh test strips, re-dose with salt . . . and try again.
And don't forget to get the CYA back up where it belongs (for you unit that would be 100 ppm. It is best to have the CYA at the maximum of the recommended range for technical reasons (and with your autofill and backwashing filter it can even be as high as 120 ppm as long as you maintain the FC at 5% of the current CYa level so you will need to test on a regular basis with a good test kit. I strongly recommend the Taylor K-2006. Don't get a K-2005 even though it is slightly less expensive.)
I would also look into disabling the autofill. IMHO, they create more problems then they cure. One of the biggest problems is that they mask leaks until the water bill comes in!