[29athrowaway]

A lazier version for the rest of us would be measuring how much time it takes to replenish the water once a day, and then turn on the pump for that amount of time each day.

You can do this with a IFTTT routine and a smart plug.

[LeafItAlone]

An issue with that is that the tree will (at least based on my experience) soak up a variable about of water while it is set up. And in general, it will decrease as time goes on (as the tree dies more and more). If you set up the routine based on the first few days, you will likely end up overflowing.

[29athrowaway]

I see. What if you drill a hole at a high water level and drain excess water?

Or use a toilet water tank kind of mechanism so that it turns off the thing manually through a switch if the water level is too high?

[steve_adams_86]

That mechanism is called a float valve. They’re really handy in all kinds of situations where you want something to fill, but not too much.