Like the oxygen cones, our saturators feature 100% oxygen-absorbing capability. The water and oxygen enter the top of the column, where agitation and shear occurs. As the water and oxygen move downward, their velocity is reduced by the increasing diameters. This allows time and space for any oxygen bubbles that have not dissolved to float. No bubbles escape from the saturator. The PAES saturators are made of thick, high-density, black, linear polyethylene with fusion-bonded flanges.