Salinity raising when heater turns on/ when temperature raises

[JohnIsNewToReefKeeping]

What could be the reasoning why the salt raises when the temperature increases I thought when tempature raises salinity lowers.

What could be a fix?

(I know salt level is low in general, working on that right now)

 

[blaxsun]

On your salinity probe you can enable the TC (temperature correction) feature. It does require you to recalibrate the probe, however. I use a value of 2.1 and it seems to flatten my curves on my minor fluctuations.

 

[Randy Holmes-Farley Verified Community Expert]

In general, salinity cannot ever change with temperature. It’s just the ways we try to measure it that do.

 

[melonheadorion]

apex doesnt actually measure salinity. it measures the conductivity, so this is probably why it changes with heat, or at least, thats my assumption. also, since it is known that electrical current can interrupt the readings, if the heater power cord is near the salinity probe wire, maybe thats the cause

 

[Lbrdsoxfan]

Electrical interference from something switching on/off or stray voltage.

 

[Randy Holmes-Farley Verified Community Expert]

apex doesnt actually measure salinity. it measures the conductivity, so this is probably why it changes with heat, or at least, thats my assumption. also, since it is known that electrical current can interrupt the readings, if the heater power cord is near the salinity probe wire, maybe thats the cause

Yes, higher temp gives higher conductivity, which is why conductivity meters try to adjust to conductivity at 25 deg C. That corrective function in the device may be turned off, or set to an incorrect correction.

 

[punchy7080]

On your salinity probe you can enable the TC (temperature correction) feature. It does require you to recalibrate the probe, however. I use a value of 2.1 and it seems to flatten my curves on my minor fluctuations.

This is the correct answer to what you are seeing in your Apex graph. Mine finally bugged me enough that I recalibrated the other day with the temp compensation set at 2.2% and same thing, minimized the swings I would see when the heater was kicking on.