I have the Taylor FasDpd test kit. The instructions say that when you add the R-0010 and then the R-0011L the sample will turn red, then count the drops of R-0009 until the colour turns to blue. My sample only turns to a very pale pink, and eventually a very pale blue, but the colours are so pale it is difficult to tell when the colour changes - I THINK around 500ppm.
Am I doing something wrong, and with a vinyl liner do I need to worry anyway?
Am I doing something wrong, and with a vinyl liner do I need to worry anyway?