alk was randomly dropping even though two different test kits and both said 8.5 but trident said 7.2 so I did a calibration and the first test and it was correct with 8.3 then dropped to 8.23 then it dropped to 8.18 while mag and calc is between the margin of error. Not sure what to do.
then dropped to 8.16 while in the same calibration fluid
then dropped to 8.16 while in the same calibration fluid
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