When aeration is used as a pre-oxidizer it is generally done with either an air inductor or an air pump. An air inductor is a venturi installed inline. The water flowing through the inductor creates a vacuum and sucks air into the water line. The faster the water flows, the more air induced into the water. Watch for pressure drop and perform routine maintenance of the inductor, as they will clog with iron over time. The air pump method allows more air induced into the water, as a mechanical pump is used to force air into the water. A contact tank is often used. This method has proven effective with the only cautions being maintenance to the pump and injection fittings.