Salinity going up by itself too fast

[vetteguy53081]

Did u find out why?

Yes- my ato was low on water and the heat below tank was causing sump water to evaporate at a faster rate
I added a fan to sump area- solved

 

[Randy Holmes-Farley Verified Community Expert]

Do you check the salinity at the same time every day? I do get swings as the day go's by.

That looks like test error due to temp changes to me, not a real salinity swing. Salinity swings only happen when top off is not matching evaporation.

How are you topping yours off?

Assuming you are not causing these salinity cycles with some sort of unusual top off scheme, then you are not actually getting a salinity swing, but a false reading from your salinity probe because it is not properly compensating for temperature.