Which one would you trust?

[sandalscout]

Very interesting that both are off, but not terribly surprising. Definitely will make me consider QA on tests when I get funky numbers in the future.

 

[BeachedMermaid]

The seachem test comes with a sample of ph calibrated solution to reference the accuracy of their own test. Shouldn't you be able to use this test reference to check your seachem test AND your pinpoint monitor? I've used the solution to calibrate many test and it works pretty well...