Temp measurements

[PeterEde]

Been using an aqua one temp sensor. Temp stable at 26degC

Yesterday bought hanna salinity checker that also test water temp.
It measure at 24.5degC

Which to believe?

Have now put glass thermometer in since they are long proven.

 

[EeyoreIsMySpiritAnimal]

Consistency is the key. Even if you don't know the actual value (+ or - a few degrees), if it's stable and your tank is not having problems, I wouldn't worry about it.

 

[PeterEde]

I thought I had it set to a good stable 26. Seems I'm 1.5degC down.

 

[EeyoreIsMySpiritAnimal]

I thought I had it set to a good stable 26. Seems I'm 1.5degC down.

That's still well within the acceptable range. (And how did you decide your second thermometer was right? Maybe that's the one that's off...)

 

[PeterEde]

That's still well within the acceptable range. (And how did you decide your second thermometer was right? Maybe that's the one that's off...)

I now have 3 Thermometers
Glass
Aquaone digital
Hanna salinity checker.
As the Hanna checker is valued by so many to test salinity I would expect it to be the most accurate of the digital ones I have.
I will check with all three and compare.