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.)
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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.