Pond and wastewater aerators turn over water with air bubbles to improve water quality. They reduce muck, lower the number of mosquitos, and prevent algae bloom which can cause fish kill. Decorative fountain pumps spray water in a variety of patterns. These pumps primarily improve the overall aesthetic quality of a pond or fountain but only provide a small amount of aeration. Pond pumps circulate water for filtration. Waterfall pumps raise water to the height required to facilitate a waterfall in a water feature. Cleaning and lights maintain, seal, line, and light ponds and waterfalls.