Issue Holding pH and EC calibrations

Hello all,

I have mycodo up and running well. My issue comes with the pH and EC sensors. Both are atlas scientific sensors connected to isolated boards (also from atlas). I have two of each pH and EC as I have two tanks that I am measuring (only one tank has automatic control of levels).

I have tried replacing all of the sensors, making connection wires shorter, and doing very good calibrations giving me a calibration curve within +/- 5%.

I am wondering if anyone else has had issues like this and has solved them.

I can provide more information if you all need it, but better to ask now than try to continue to troubleshoot it myself.