Questions about testing CH levels in a pool with copper.
I have decided to start shocking with cal-hypo, even though still using liquid chlorine for daily chlorination. The reasons behind this are a pulled muscle in my right side, the fact that my calcium hardness levels are low enough to be able to do this, and the heaviness and awkwardness of liquid chlorine. I tested my CH levels at 150 a little over a week ago with my TF100 test kit, BTW.
Needless to say, I know that I need to be sure my test results are always correct when using a chlorine that adds calcium to the water. Leslie's had tested my CH at 250 only a week before I tested 150.
My questions are this:
1. In the instructions, it says while testing calcium to add 2 drops of R0012 prior to adding the R0011L if there is copper in the water. I know I have some, since I had put the PoolFrog BAM (a copper based algecide) in the water at the beginning of the season. So I did this. In Leslie's, they use Taylor reagents, and while I do not if the CH test works exactly the same, I do know that she did not put in a couple of drops of the one reagent, and then add the other; she just did the reagents in order. Could the difference in testing have made such a difference in the results?
2. How much copper has to be in the water in order to have to add 2 drops of R0012 prior to adding the R0011L? 1PPM? .5PPM?
3. In order to test my copper for the purposes of this test, should I get a copper test kit, or is the aqua check or some other guess strips sufficient to give me an idea? I'm just wondering how accurate I have to be in finding out how much copper I have in my water. At Leslie's they tested .15 ppm, but I'm not sure how much I trust that, because the manager was trying to tell the girl doing the testing I "didn't need" my copper tested, and "don't waste chemicals." I managed to talk them into it, but with an attitude like that, who knows how long that reagent was sitting around!