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pH testing pen?

Karen B.

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I am a bit of a lazy tester which is why I love aquarium coop test strip. However, for some reason, it doesn’t read the pH (probably because it’s canadian water! 🤣😂).

So I am looking for a pH testing pen that I could use to test the pH on my aquariums. Do you have suggestions. 

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I use a blue lab pH pen accurate to 0.01 I have used it for two years not had any problems I have bought cheaper pH pens in the past and they aren't very accurate and don't last as long

Edited by Colu
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