What happens when you tell your 18 year old son he can build a pond in your backyard? Why this of course! This is the almost complete version just a little more work to do... there are two 7500 gph pumps(they draw about 17amps combined) with 2" piping for each pumping water to the top which has about 17' of head and the pipes are about 60' in length... the bottom pond is anywhere from 5' to 2' deep in parts... this has been my summer project and I'm just about to finish it up!!