Does anyone have any ideas for an electronics project for the fishkeeping?

I run another website for my electronics and programming projects - https://robotzero.one/ and I wondered about doing something that brought the two hobbies together.

The most obvious one would be a water level monitor or leak detector that sent a message to your mobile phone and sounded a loud alarm. I'm sure someone has already made something like this but if anyone has a good idea or something they would like developed, let me know.

I can find the components, write the code and design a 3D printed enclosure if necessary.

I'll have to say that, for me whose biggest fear would be a leak, a water level monitor or leak detector would be ideal.