Let her cool off!
I completely understand her concern,
that could've VERY EASILY been a fire, for sure. But Obviously you learned your lesson, and the big man's looking out for you. I think she's probably more upset about
that than the fish no?
I think EVERYONE in reefing will make at least 1 DIRE mistake. It's inevitable. Everyone at some point has a tank crashing mistake, and then after that they realize not to play with the beast and double,triple check everything.
I've crashed a tank years ago from similar super easy and simple oversights which I just killed myself for for months. Whether it's forgetting your heater MUST be submerged in water, or forgetting that you didn't plug in the power head after you unplugged it for some reason, or messing up your ATO or forgetting to refill it, or forgetting to disconnect or shut off a valve before you turn off a pump. countless little errors that could happen.
It's those little "oops I forgot moment" normally something so stupid, and then BAM! big problem.
I think if you can let her cool down, then approach her at a time and say look, here's the deal. I know the mistake I made and here is how it will never happen again:
X, Y, Z etc. she might give you another chance
Is the main tank an AIO? or do you need a sump?
If there's a way to just keep it "as is for now" until she cools off

That's my 2 cents.
Otherwise next time, make her name everything

I make my GF name EVERYTHING in my tank... then she can't hate them... they're her children too


;Pompus