Apex pro won’t stay calibrated

Neptune

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My ph and temp probs won’t stay calibrated on my week old Neptune apex pro. I tested them against 4 other sources and the Neptune is wildly different. Even when I recalibrated them they climb or fall away. Tank doesn’t have fish in it yet and I can’t figure out what the issue is. I read the prob wires should be run away from power wires so I made it so the wires never get within 4 inches of anything with power in it.

I don’t know if the ORP prob is right because I have no way to test it and it wasn’t my first concern.
 
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ShepherdReefer

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We have two systems. One PH probe reads close to the other testers, and the other does not. I use that as a reference point and know when it reads 8.1 that, it is reading 8.4.
 
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