Help Not sure about results of SN reagent aquarium test with higher max value

[martinso67]

At least I got to test my SN that I got before 8 months, which was produced mid 2023.
I have a SN test with the last color range starting from the value 3.3mg/l. I followed the PPEH test protocol with taking only half of SN water.
I adjusted it to 5mg/l (as opposed to 10mg/l like in PPEH). So because of that adjustment I should get as a result about 2.5mg/l (range of color red).

For me the result of the fluid seems to have the color red (so it should be about be between 1.6 and 3.2). But when I use the SN aqua test software to read it shows I reached 3.3, which means the fluid has pinkish color. Retrying taking the picture for the evaluation through the software did bring me still in the color range of the last color on the bottom (pink).

The tested fluid: (It seems to be red at least for me??)


Color levels of SN test (sample)


Another angle of the tested fluid

The color range is not so clearly on this picture, please check the "sample" image above.

Thank you all

 

[roommate]

I wish I could tell it for you man :/

 

[TurboCharcha]

I cannot tell with confidence which shade of red your result is. I'm sorry.

I need to tell you though, there is a problem with many SN testing guides on this site. Visit this post for details and a way to do test correctly:

Problem with SN testing information

I'm making this post because I'm worried that people might be testing their SN wrongly. If I'm right, then tests done with the method explained in the SN bible (and everywhere else I have found on this site) will lead to an underestimation of the tested SN purity. This, in turn, may worsen...

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