Hi all, I was just wondering if anyone knows if Amazon bluelabs ph pen replacement$59.99 will work for grobo? They should be compatible but I would like to double check . I just notice thru grobo store 79.99 and does come with 2 sachets 4/7 calibration solution. But I only need to replace pen.
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Yes it will work.
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Ok thank you
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You are welcome 
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