A method and apparatus for the treatment of water with a gas or nutrient infused liquid. One embodiment delivers an oxidized water supply to a wastewater digester medium by means of pure oxygen introduced to the water supply via a pressure vessel or other means to infuse the liquid. This oxygen infused liquid is delivered to the medium to be treated at a critically controlled depth via a surface float delivery system. The invention involves delivering the oxygen infused liquid via nozzles which are located strategically in the supernatant allowing an extended oxygen-water interface time without over oxidizing the sludge blanket below.