DPD Powder (R-0870) Useful Life?

Steve-D

Bronze Supporter
Jul 10, 2020
161
SW Boston Suburbs
Pool Size
20000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
In early 2021 I bought the TF-100 test kit and shortly thereafter my wife decided that we had to find a new house before the market passed us by. That summer I maintained our "old" pool using my old Taylor kit pending sale of the house and never used the TF-100.

I opened the TF-100 and used it for the first time today for the Cl Drop Test on our new pool and found that the DPD Powder (R-0870) had hardened and partly crystalized. I ground it down for my test but have to wonder if what I have is still good or if the test I ran with it is reliable, too.

If I need to replace it (DPD Powder R-0870) where do I go for that?
 
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