Karen B. Posted December 6, 2021 Share Posted December 6, 2021 Greetings 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. Link to comment Share on other sites More sharing options...
Colu Posted December 7, 2021 Share Posted December 7, 2021 (edited) 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 December 7, 2021 by Colu 2 Link to comment Share on other sites More sharing options...
Patrick_G Posted December 7, 2021 Share Posted December 7, 2021 I agree with the advice to stay clear of the cheap ones on Amazon. Mine lasted about a month. I think it wasn’t waterproof! 1 Link to comment Share on other sites More sharing options...
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