Waterfall Pumps push the water to the top of a waterfall and circulate water in a pond. When choosing the proper pump, take into consideration the waterfall height, diameter of spout, and size of the pond. Constant water circulation prevents rapid algae growth and is paramount for a healthy ecological balance. Waterfall Pumps are generally for outdoor use but might be used indoors on certain applications. Canarsee has a good selection of waterfall pumps for your home.