I am shocking pool to get rid of algae. I am going through the R-0871 reagent very quickly since I am testing multiple times a day (at least two). I have ordered more but it won't be here for 3 more days. Is there anything else I can do to test my FC? I don't want to have made all this progress on my shocking and then go backwards because I am out of testing reagent.
PLEASSE HELP!
PLEASSE HELP!