Any probe that looks like this is usually shit.
PH strips are easier and accurate enough for what you need.
this post was submitted on 11 Sep 2023
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I have heard that they are not. I have done pH testing the manual way with strips. They are extremely cheap, simple and accurate.
I purchased one of these thinking it would work.
It doesn't, it's garbage
No. I’ve had a similar one that, even when I stuck it in a glass of water, went no further than “lightly moist” on the indicator. Worthless.