Smart Shrimp Posted January 10, 2016 Report Share Posted January 10, 2016 Please help wanted to know what PH pen you find to be the best and long lasting and what is the average life expectancy from a ph pen probe before needing to be replaced for a shrimp room usage? And any tips or advice to prolong the the life expectancy of the ph probe? Thank you, PJ Quote Link to comment Share on other sites More sharing options...
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