Abstract: A water treatment apparatus can include an influent water delivery arrangement for delivering influent water containing contaminants and dissolved air. An elongate process channel can float the contaminants with the dissolved air to separate the influent water into a layer of the contaminants floating over cleaned water. Separation of the influent water can initiate near the front region of the processing channel and progress moving downstream toward the rear region. A cleaned water outlet arrangement can be included and have at least two laterally spaced apart outlet conduits extending through the rear wall of the clarifying portion of the process chamber near the bottom wall. Each outlet conduit can have an elongate intake opening extending along a bottom of the outlet conduit facing the bottom wall for intaking cleaned water upwardly from the bottom wall into the outlet conduit.