Very simple and effective solution : Put your feet down Whos the Boss ?
Ok , Ok, a less confrontative way, buy a new tank c/w sump, when the Queen is away. After that, all hell break loose, but its too late for her to do anything. Be prepared to sleep alone, though.
See, the real problem is not the tank, but authority. ( learn it from Dog Whisper )
Good luck, pal. Do note that it can be a dangerous encounter. Hell hath no furry,like a woman scorned.
cheers