I'm creating a 28gal bow-tank...and i definitely want to make a water feature in it. im just not sure how to go about it. what i really want is to hvae a small waterfall trickling down from one corner through a little stream and into a small pond. any insight on how to get this done? i notice that some use quick-set mortar to make a good stream channel, is this a good way to go? any help is much appreciated!