So you have 3 thermostats in your tank--2 controlled by inkbird and one reduntant in case?The Apex is also great for failover/disaster scenarios. I use an Inkbird with a pair of Schego titanium heaters, and the Apex monitors temperature independently. If the temperature rises too high, it kills the outlet. By the same token, if it drops too much I have a backup thermostat on an energy bar outlet that kicks in. And all this happens seamlessly without input from me - all I get is an instant remote notification on my phone.