Ok Dave...
Two days now holding overnight readings...CC is 0..pool always clear..Its losing a lot during the day though but I'm adding more bleach to reach the 15 ppm..
Losing during the day is OK right? Even though I'm using only a drop of the powder reagent, I can see it going fast using it twice a day. Can I buy a cheap test to use once in awhile?
Thank again for all your help
Marcy