DPD Reagents CAN Go Bad
Channel: Charles McGowen
Date: 2011-08-23

We've been taking care of a pool for a few weeks now. All of the chemical testing equiptment has gone bad and gives eroneous readings when you try to use it. We also take care of a water and sewer company and have exacting equiptment for that part of our job. 
 Here I show what happens when you try to use old stuff to measure the chlorine residual and compare it to our water co. equiptment.