Heater advice

[Etto]

I'm trying to plan for as many issues as I can with setting up the new tank. I have 2 BRS titanium heaters plugged into an Inkbird which is plugged into the Apex. The inkbird controls the heaters and the Apex just to shut it down if it gets to hot or alert if to cold.
My question is how would I know if one of the heaters fails? My fear is one would fail and I wouldn't know it then when I'm away the other would go. Should have one in plugged directly into the apex and monitor Watt output on both?
Appreciate any advice on how people handle this.

 

[Jekyl]

I have one heater set 77 to 78 and the other set 76 to 77. I'd notice from the temp change.

 

[noobster]

Same setup, two elements plugged into inkbird.

I made a virtual output to alert me if the watt draw from the outlet is in a range where only one heater element is on. I think I'm running a 200w and 100w heater

Set OFF
If Output Heater_2_4 Watts > 90 Then ON
If Output Heater_2_4 Watts > 280 Then OFF
Defer 000:30 Then ON
Defer 000:30 Then OFF