Heater problems/issues heating to correct temp...

[the.cornish.reefer]

Anyone else has issues with heaters on the waterbox 20 cube
I've tried two different 100w heaters now in the middle chamber set to 25 degrees and both times when testing the display tank temp it's at 24 degrees.
First time i thought it was a faulty heater, but surely not again with a different brand too.
Currently trying the siccee scuba contactless 100w.
My other thought is do I just leave it set at 30 degrees and use a temperature controller to regulate the temp of the tank?

Anyone else have any ideas?

 

[VintageReefer]

Anyone else has issues with heaters on the waterbox 20 cube
I've tried two different 100w heaters now in the middle chamber set to 25 degrees and both times when testing the display tank temp it's at 24 degrees.
First time i thought it was a faulty heater, but surely not again with a different brand too.
Currently trying the siccee scuba contactless 100w.
My other thought is do I just leave it set at 30 degrees and use a temperature controller to regulate the temp of the tank?

Anyone else have any ideas?

I see no issue. Heaters typically have a range of accuracy of +/- 1 degree.

It’s heating middle chamber to 25, which begins to cool slightly as it exits the chamber. Comes back as 24. The whole tank is within 1 degree. The heater doesn’t engage again.

Just set it 1 or 2 degrees higher if you want the display 1 degree warmer. Or use a heater controller with probe in the display

 

[VintageReefer]

Plus. Whatever you are measuring the display with also has its own margin of error.

Everything is working fine, these results are expected

 

[the.cornish.reefer]

Thanks for the response guys, appreciated