I have both the Taylor K2005 kit and the FAS/DPD tests... but this is the first time I've used the FAS DPD test.
I've been consistently testing CL at about 3ppm in the AM (using the k2005 kit), adding a gallon of 12.5% liquid chlorine a day and some MA about 5 times a week to lower my PH... rinse and repeat and all has been great. Water looks and feels awesome.
Today, about 2 hrs after adding my gallon of liquid chlorine I did the FAS/DPD test twice and came up with FC 11 and FC 11.5. CC came to 0 both times, so that's the good news I guess... but why the huge discrepancy?
I did the k2005 test after, to double check my FAS/DPD results, and sure enough shows CL at about 6ppm, maybe 6.5.
Pretty sure I did the FAS/DPD test correctly... I used the 10ml mark so multiplied by .5 and I have the speedstir which was running the whole test (performed the whole thing rather quickly)... so what gives?
Thanks for the input.
I've been consistently testing CL at about 3ppm in the AM (using the k2005 kit), adding a gallon of 12.5% liquid chlorine a day and some MA about 5 times a week to lower my PH... rinse and repeat and all has been great. Water looks and feels awesome.
Today, about 2 hrs after adding my gallon of liquid chlorine I did the FAS/DPD test twice and came up with FC 11 and FC 11.5. CC came to 0 both times, so that's the good news I guess... but why the huge discrepancy?
I did the k2005 test after, to double check my FAS/DPD results, and sure enough shows CL at about 6ppm, maybe 6.5.
Pretty sure I did the FAS/DPD test correctly... I used the 10ml mark so multiplied by .5 and I have the speedstir which was running the whole test (performed the whole thing rather quickly)... so what gives?
Thanks for the input.