As water flows through the bottom of the shroud and four additional holes, the propeller mixes and forces the water above the surface through our patented unique design. The high pumping volume degasses the water of nitrogen, carbon dioxide, and hydrogen sulfide while raising dissolved oxygen levels. Degassing gets rid of nutrients that cause algae and weeds, resulting in both clearer water and decreased odor. Aeration also mixes the water, minimizing anaerobic zones in bottom water and bottom sediment surface. This stimulates the conversion of potentially toxic ammonia to toxic nitrite, and finally non-toxic nitrate.