This water feature circulates 20,000 gallons per hour through a stream and waterfall fed by connecting a lake. The cascades increase oxygen levels and circulation in the lake by breaking the surface of the water. San Diego Ponds used a variety of boulders, rocks and pebbles of different shapes and sizes to create a natural, informal style. A variety of grasses and shrubs were planted in the stream and border to blend the water feature into the surrounding landscape.