I am sure some of you have thought of this but those who hadnt and are trying to figure out a waterfall setup...i made this one for my basement pond, but you could easily make and use an end like this for your waterfall(s) outdoors by tucking one or more inbetween some flat stones and sealing with some waterfall foam. and would work well for multiple spill points in the falls. much better than water coming out like the end of your garden hose. you can see theres good aeration, and the water sheet is 8" wide where it hits the waters surface. this is a 2" pipe heated flattened out at one end and shaped so the slot is nice and even. i know i could get atleast 12" on a 3" pipe. i have a tetrapond 1000 gph pump running this system. a couple ball valves to control water flow out each spill point.