Hi there I’ve been searching through the forums and is a little exhausting. Any idea best brush or cleaning tool for the ph probe? Gonna harvest tonight and am overthinking the whole shut down cleaning process
toothbrush…use with care …slight twisting action is enough…
recommended to keep some 4.0, 7.0 and KCI solution around too
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Might not be helpful in time, but you can get the ph + EC probe care kit Grobo sells direct from blue lab on Amazon. It comes with all the calibration solutions as well as the pH probe storage fluid, and probe cleaning stuff.
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Thanks guys I’ll buy for future the kit I do at the time have a sample pack calibration solution will find an old brush as well. 
Looks good.
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Has to be a very soft brush so it doesnt scratch the probes reading surface! 
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Thank you I will definitely consider that