Literally staart by digging a really big hole! 12 to 18 inches is penty deep. The most expensive part is the liner. Cut to fit and leave some hanging over the edge to be covered by rocks.The rest is a simple filter. You can create a nice waterfall at one end just by running the tubing under and behind stacked rocks. The rest is the fun part : landscaping. Hostas and ferns are great for shade. They grow quickly and drape nicely.