I just took a CH reading and noticed something unusual. After adding and mixing the R11, the water sample turned clear/red but had red "particles" floating in it as well. i would have expected the solution to be relatively clear. After adding the R12, the water sample turned clear/blue as expected and the "particles" as well.
Could something be wrong with my reagents or water? TFT-100 Kit was ordered in May. Water tests and looks fine.