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Mywife would like a waterfall spilling into the spa. this would be on the outside of the spa much like you see in a swimming pool. The water must recirculate from the spa thru the waterfall to avoid overflowing the spa. To do this you must somehow connect the spa to the waterfall pump. this cant be done to a jacuzzi because it would void the warranty. The dealer for the sunset spa can do this because tehy customize the whole spa. Sunset only makes the shell and the dealer does the rest. the problem is that the jaccuzzi felt far superior to the sunset, but unfortunately i think my wife is more concerned about aesthetics than the spa. Go figure