The foam is nothing more than spray foam in a can. Squirt it in the cracks and it swells and fills in the gaps between the rocks. The secret to a good successful waterfall is getting the rocks that you intend the water to cascade down level from side to side and sloped slightly downhill almost level front to back. The best way is trail and error. Simply play with the design and use a garden hose to test the water fall before installing the pump, pluming etc... I have built two on my pond pretty easy project except placing the large stones can be a choir. Good luck with your project.


The road goes on forever and the party nevers end...............................................