Is my temperature swing normal?

[canadianeh]

I am using inkbird controller on top of Neptune. My temperature swing controller has been
Ike the one on the picture. One day it dropped so much I don’t remember why but I think it was the day when I messed around with the inkbird trying to get the wifi to work. Anyway if you ignore the one in Mar 26-27, is the temperature swing on the remaining days consider okay and normal? I would like to get it tighter but not sure what else I can do?

This is what I put on the Neptune:
Fallback OFF
If Tmp < 79.5 Then ON
If Tmp > 80.0 Then OFF
Defer 001:00 Then ON
Defer 000:15 Then OFF

This is what I set on inkbird:
T1 = 77.5
T2= 78
Maximum running time =7 hours

I have two heaters connected to the inkbird. The primary one is Cobalt neotherm set at 79 and the second one is Eheim set at I

 

[sarcophytonIndy]

Fallback ON
Set ON
If Temp > 77.4 Then OFF
Min Time 010:00 Then ON
Min Time 010:00 Then OFF

 

[canadianeh]

Fallback ON
Set ON
If Temp > 77.4 Then OFF
Min Time 010:00 Then ON
Min Time 010:00 Then OFF

Yours fluctuations are tighter and I like it.
If I use your instructions, will it work with my current setting above?

 

[sarcophytonIndy]

From what I can see, the Inkbird is doing the controlling for your setup since your Neptune control temp points are higher and will never be reached unless the inkbird fails. I would switch that around, and lower the Neptune (for example use my settings), so that the Neptune is doing the control work, and the inkbird is the emergency shutoff.

 

[canadianeh]

From what I can see, the Inkbird is doing the controlling for your setup since your Neptune control temp points are higher and will never be reached unless the inkbird fails. I would switch that around, and lower the Neptune (for example use my settings), so that the Neptune is doing the control work, and the inkbird is the emergency shutoff.

I did it purposely so that if inkbird failed it is cheaper to replace