- Location
- Woodbridge
Anyone ever have this issue I have been using my Hanna checker to dial in my doser and been reading similar numbers the whole time. I get low on reagent so I order a new batch. The new batch is reading a full 2 points less. So I just did 4 tests with each old is reading 9.5 New is reading 7.5. Yes 4 times for each and same thing. What to do? Which is right?
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