I have an aquarium… generally find a low-stock planted aquarium isn’t too high maintenance. Lights are on a timer (actually spent just a little more for a dim on/off system so they’d have a ‘sunrise’ and ‘sunset’) I feed them when I have dinner, or when I get home if I’m having dinner out of the house. I’ve got tape marking what I try to keep as the minimum water line (warm water, it evaporates over time).

Water changes used to be a big enough chore I’d let it go longer than I should but then I got a nice Python system and now it’s only an issue if there’s dirty dishes in the sink (don’t want to dump tank water on them and the system requires a faucet with temp control)