I received my TFTest kit about a week ago and have used it several times since but need reassurance I am using it correctly. I have read the extended test kit instructions as well which were very helpful. My biggest question is with the chlorine test.... When adding R-0871 and counting the drops to take the water to clear, it seems as though the water appears clear but (because I'm OCD and study it for so long) it seems to get a pale pink tint within 10-20 seconds. Is this the color I should go by which would require another drop or is it the initial appearance of clear? I read that if it sits for a minute it will turn pink again but I'm not letting it sit for that long, more like 10-20 seconds? It doesn't seem to affect FC too much but could cause my CC reading to be way off if I'm not exact!