We’ve run dry maybe 2-3 times. That was before I started checking it on a regular basis. I’ll order water at between 10,000-12,000 gallons just to be safe
The last 1,000 or so gallons is below the foot valve so we can’t get to it.
I’ve stayed in several homes on various Bahamian islands that used cisterns for water supply. It’s a very efficient, and common, way to capture and utilize water. One place did have a little bit of a froggy smell to the water lol, but that’s likely because their filter system wasn’t up to par. Didn’t kill any of us, so we didn’t really care