Broken salinity probe?

[jgvergo]

I recently moved, and now that I've set up my tank again, my Apex is showing a salinity level of 0.8 when my reflectometer shows 35.0. I doubt it's a calibration problem. I know that salinity probes are very fragile. What part of the probe typically breaks? Is it visible to the naked eye?

 

[DLHDesign]

I doubt it's a calibration problem.

When you calibrated the probe, did it read 35ppt at the end? BRS has a good video on calibrating these.

If the probe did read 35ppt at the end of calibration, yet is reading 0.8ppt in your tank, something in the tank is throwing off the reading. It may be stray voltage, perhaps?

I don't think you would be able to see the fragile parts of the probe without taking the probe apart - which, of course, is likely to break it even more that it already might be...