How do you a water fall from the ceiling down into a little troth like pool on the floor.?

First try this Instructable for information on constructing an indoor pond.

Note that your average pond pump may not be strong enough or fast enough to lift nore than a trickle of water eight feet high. My rough calculation shows that creating stream of water 8ft tall by 1 inch in diameter would require at least a 1700 GPH pump to keep that much water in the air. (Consult a pump expert for the rating you need. I am not one.)
iPodGuy8 years ago
You would need a pond pump to pump water up from the trough to the top where it will spill out back into the trough.