I did a FAS-DPD chlorine test using the 25ml sample last night and this morning to check if my chlorine was dropping over night (it's not).
It was at 7.2ppm. That seemed higher than it should be so I did the 10ml test which I normally use and I got 5.5 ppm. Can anybody explain this difference to me? I did both test multiple times in the last 12 hours with almost the same results every time. Always with the 10ml sample lower. I usually base my adding of chlorine off a 10ml test but think now I marry be adding more chlorine than I need.
It was at 7.2ppm. That seemed higher than it should be so I did the 10ml test which I normally use and I got 5.5 ppm. Can anybody explain this difference to me? I did both test multiple times in the last 12 hours with almost the same results every time. Always with the 10ml sample lower. I usually base my adding of chlorine off a 10ml test but think now I marry be adding more chlorine than I need.