I have been looking at some of the pictures in the pictures forum and amazed at the waterfalls that people have created. What is involved in getting into this? Does this involve a lot of plumbing and if so are there any specific licenses that need to be obtained? I'm just thinking out loud. I would love to learn to do this and would obviously need to take some classes and get some hands on training. Any thoughts? Any advice or responses would be much appreciated. Thanks!