Apex salinity probe drift?

[Floyd-]

Setup the Apex and its worked flawlessly but every so often the salinity bottoms out to about 31ppt and causes a lot of errors and warnings. I can take the sensor and move it around a little and reseat it and it works again for a month or so after I "reset" that.

 

[AydenLincoln]

I had the same issues! Have you recalibrated it? I’d do that and look into one a salinity stabilizer as if it’s in an area without any flow it can affect the reading. If all else fails reach out to Neptune support. https://www.bulkreefsupply.com/sali...JJb0e8-C3KmbsUMRzR44T1K4aqCIspTIaAqerEALw_wcB

 

[Floyd-]

I dont have much fluctuations when its good but then all of a sudden it will drop from 34.5 or so down to 31-30 in the course of an hour or so. Sometimes it shoots back up and its fine but most of the time it requires intervention to get back to where it belongs.
Tonight ill go ahead and clean and recalibrate it and see what that does.

 

[AKL1950]

It’s getting micro bubbles in it. I took a tall kitchen glass, set it in the sump and put the probe in it. It’s been super stable every since. Reads exactly the same as my backup tests.

 

[ReefRondo]

It’s getting micro bubbles in it. I took a tall kitchen glass, set it in the sump and put the probe in it. It’s been super stable every since. Reads exactly the same as my backup tests.

Excellent idea!

 

[Floyd-]

It’s getting micro bubbles in it. I took a tall kitchen glass, set it in the sump and put the probe in it. It’s been super stable every since. Reads exactly the same as my backup tests.

Love it but the significant other mustn't know about this :rolling-on-the-floor-laughing:

 

[Floyd-]

Ok good and bad...
Good is after cleaning and calibrating its rock solid reading (within .1ppt fluctuations)
Bad is the reading is not right. Its reading 37ppt and I checked with my Hanna checker and refractometer and its right on 35ppt.

Why would there be a 2ppt offset? can I change that offset in apex?