Having difficulty with temperature stability

[Kial]

Hey

Struggling keeping my temperature stable now it's getting colder here in Australia.

I have 3 separate digital thermometers to check the tank temp and they all seem to show different temps. Ranges from 24-26 so I'm not 100% sure what the actual temp is to keep it stable

I have 2 heaters set at 25C (one is 250w and the other is 300W on a waterbox frag 145.5


Would that range cause issues if it is changing from 24-26?

I'm hoping it is actually 25 that the heaters are set at

 

[Dom]

I would suggest using a temperature controller. Inkbird makes one, or you can build one from scratch.

 

[eqbal9947]

Inkbird is cheap and carefree.

 

[Kial]

https://www.amazon.com.au/Temperature-Controller-Waterpoof-Thermometer-MarineSaltwater/dp/B07WTBPH2Z

Something like this?

 

[eqbal9947]

https://www.amazon.com.au/Temperature-Controller-Waterpoof-Thermometer-MarineSaltwater/dp/B07WTBPH2Z

Something like this?

 

[Kial]

Are you able to turn the temp up and down just by using the controller? As my heaters you have to dial the top of them.

Or do you use it just for the temp probes and fail-safe etc

 

[eqbal9947]

Are you able to turn the temp up and down just by using the controller? As my heaters you have to dial the top of them.

Or do you use it just for the temp probes and fail-safe etc

Honestly not sure, I bought titanium heaters and its just plug and play

 

[Kial]

Honestly not sure, I bought titanium heaters and its just plug and play

Interested if I would be able to adjust with just the controller. I have one aquaone heater and a eheim. Can't imagine it would be able to adjust them

 

[Gtinnel]

Interested if I would be able to adjust with just the controller. I have one aquaone heater and a eheim. Can't imagine it would be able to adjust them

I use the same InkBird and yes you set the temp when it turn the outlets on and the temp when it turn the outlets off all from the app on your phone. I then just set the heaters set slightly higher than the InkBird to act as a backup so if the InkBird fails on.

 

[flyingscampi]

I use a D-D Dual Temp Controller: https://www.theaquariumsolution.com/product/3077/273

I live in the UK so I never have to worry about the cooling function.

I use a Eheim Thermocontrol heater to control water temperature - the D-D controller is only used to prevent overheating if the heater sticks on. The controller's target temperature is set 0.5°C higher than the normal water temperature so it remains in heating mode and doesn't keep switching the controller and heater off and on.

If I was to add a second Eheim, I would set it 0.5°C lower than the primary heater to function as a backup.

With this system, a heater failure can only cause a temperature fluctuation of 0.5°C
If a heater sticks on, the controller will switch it off after water temp is raised 0.5°C.
If a heater sticks off, the other heater will maintain temperature.