variance

  1. Jesse Sunday

    2 Apex reporting different specs in the same system... (Temp and pH)

    HI All! TL;DR: Why would an Apex Jr and Apex Pro report pH numbers that are ~.20 different and Temp ~0.8 different? Am I worrying over nothing? Is that variance normal? Here's the long version. I installed a new Apex Jr system in my 90g tank a few days ago, went through the pH calibration...
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