So I just got a new container of R-0870 and R-0871 from tftestkits. Before then, the pool store told me my FC level was at 5 (now I know that's as high as it goes for them). So I was excited to do a proper test and get accurate results.
I filled the vial up to the 10mm mark, put in 2 dippers of R-0870, dissolved and began adding drops...and more drops...and more drops....and MORE drops. I stopped adding drops when I reached over 115 and the water turned a darker purple from pink. It never turned even close to clear. I swirled very well between drops per the instructions too.
Can my FC be that high? I have very high CYA levels too at, I estimate, over 200.
What gives? I haven't added chlorine in over a week. Can it still be that high?