Damn ph20 giving me hell calibrating this morning. Giving Er1 no matter what I try.
Reading 7.4 in the 7.0 and 4.4 in the 4.0 solutions. 6.5 in the feed water and the pool tester has the feed at 6-6.2 area.
Might have to order another ph pen.
What brand pen is that?? Apera? Just wondering cuz my apera pen eventually did that and would only give error message when attempting to calibrate! Went into la basura once that happened!
Foop actually gives away free samples to anyone who asks! Only deal is u gotta have it shipped to your local grow store! I had mine sent to my local shop and they kept sending him case after case of free samples after mine to the point he said fuck it and started putting the sample boxes on the shelf to sell!
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