See if you can run essentials off of extension cord from another outlet that’s on a different circuit (ie- not the same breaker that tripped).
Essentials are pumps/flow, so no lights & no Apex.
You can manually dose (if needed) & feed for a day. All fish & corals should be ok.
If a breaker trips when you plug in a pump, then there’s your problem (but I’ll be surprised if it does).
Lastly, breathe. It will be ok
Edit:
just saw your post on wireless router, good job!
Unplug router, reset breaker if needed, then see if everything else comes back on.