Why does Apex Salinity Randomly Shoot Up?

[Morpheosz]

Does anyone know why this happens occasionally/randomly? Sometimes it's because bubbles get caught under the probe and I tap the probe a few times and it returns to the proper reading but other times there is no discernible reason. I woke up this morning and from 1am till the morning it went from a stable reading of around 36 up to 42. I tapped it out and it went up this time to 45. And yes, I double checked with refractometer, it's still dead on 35.

 

[KrisReef]

This is the main reason I have resisted having electronic monitors in my system; the probes are a huge source of testing error and I would worry that it could set off the ATO if they were linked and cause problems beyond their usefulness.
I do have temperature and pH(CO2) controllers but even those cause me angst but nothing beats out being on scene to check and adjust for issues when they arise.

Someone must have a better understanding of what’s happening specifically with your situation. You may have to replace the sensor.

 

[Morpheosz]

I hear

This is the main reason I have resisted having electronic monitors in my system; the probes are a huge source of testing error and I would worry that it could set off the ATO if they were linked and cause problems beyond their usefulness.
I do have temperature and pH(CO2) controllers but even those cause me angst but nothing beats out being on scene to check and adjust for issues when they arise.

Someone must have a better understanding of what’s happening specifically with your situation. You may have to replace the sensor.

I hear you. In my case it's exclusively been salinity that has been touchy over the past 18 months. Works great 99% of the time, but once in a while it just takes off in the upward direction, usually for no discernible reason. Bubbles are the only cause I've found that I can easily fix but my probe is now in a spot where unless some maintenance is happening, there's no chance of getting bubbles in it randomly.