Here is the waterfall after adding some more rocks around it. I have tried the waterfall to make sure everything is graded properly. When I get everything in place, I will use waterfall foam to fill in all the cracks and seal it up so the water flows down to the pond and does not back up behind the rocks or anything. I watched a lot of YouTube videos about waterfall construction. This is the second waterfall I have constructed, but I really want to get this one right. I don't expect to do it again! Michelle tells me it looks just like a big pile of rocks.....but I think it will be improved by the addition of some plants, etc. I am actually quite pleased with the effect so far.