Salifert pH Test Help

[CheifReeferNB]

I am having trouble interpreting pH results on the color chart. The two tests are from an evening water sample and early morning water sample. My pH probe is giving me a high of 8.25 and low of 8.15 respectively. The salifert test seems to be between 8.3 and 8.6 in my opinion as the sample almost seems teal.

Can anyone with any experience with the salifert test give me their opinion on these results and what color matches best?

 

[Randy Holmes-Farley Verified Community Expert]

I'm not a fan of pH test kits for a variety of reasons, but that color seems to indicate a fine pH in the low 8's range. pH is fine in a pretty wide range, at least including 7.8 to 8.6.