How do I test for copper only? My daughter has super blonde, almost white hair and the ends are turning green. We have been swimming consistently since March and this hair thing has evolved over time. Everything I've read points to copper. However, we filled our pool with pond water and then shocked the crap (literally) out of it. I have the TF-100 test kit but it looks like it mainly tests for Calcium Hardness. I just did that test and the number came to 120. We have a vinyl liner. I am confused because the directions say to add two drops of R-0012 if water contains copper. Don't know if I do, but I would love to find out if I even have copper.