Quote Originally Posted by Jacob99 View Post
Okay, as a little test for myself - I poured some straight bleach into the 25ml tube. When I did that the sample immediately turned a bright pink, but then went clear. After stirring no pink. I prob put 1/2 teaspoon of bleach into 25ml of my pool water. Is my powder a dud or something? Or am I the dud?
When your test flashed pink then clear, it was likely because the amount of bleach you used in your test was way too much and bleached out your DPD. Your DPD is trustworthy, it flashed pink before being bleached out.