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...
10x bottles of Neptune calibration solution for trident
4x bottles of reagent A.
no idea how I got 4 bottles ahead on A….. but here we are.
calibration solution $6 per or $50 for the lot
Reagent a $8 a bottle or $25 for the lot