Trouble keeping my temp stable

[Jonny Walker]

My temp fluctuates between 75.8 to 77
I am trying to keep it at 77 the heater is in the middle chamber, the temp probe in the return.
Inkibird is set to 77 the deviation is set to 1 the lowest it will go.
Tank is a waterbox peninsula mini 25 (AIO)
Heater is 100w BRS titanium
Controller is inkbird I have an apex as well.

 

[T-J]

Perhaps putting the temperature probes in a chamber before the heater may help? If the heated water is flowing past the probes, it might be thinking the tank is at temperature, then shutting off the heater.

Also, what's the temperature of the ambient air in your home? Do you have any fans or anything else blowing air onto your tank or sump?

 

[Jonny Walker]

I only have the 3 chambers in the back I will put the temperature probes in the far left end of the middle chamber and put the heater at the far right the chamber is about 9” long I will see if that makes a difference
No fans temp is about 68/70 in the house

 

[Mystikal]

Not too bad of a swing…here’s my one for perspective . Really haven’t caused any issues.

 

[Dburr1014]

I get 1.5 swing with no problems

 

[Ruge13]

How often do all your temps move? Mine swings up 2 then down 2 every 4 hours.

 

[Idech]

The Inkbird is more precise if you use Celcius instead of Farenheit. The lowest variation is 0,3 or 0,5 Celcius, I can’t remember.

Worse case, with 0,5 C, variation, 77F is 25C and 25,5C is 77,9F and 24,5 C is 76,8C.

 

[PeterEde]

Heaters in sump, sensor at return

 

[T-J]

Mine swings 1 degree using an Inkbird.
600w heater on a 120 DT with sump.