A slide processing apparatus comprises a slide or processing station which may include a plurality of cuvettes, each cuvette configured to receive a slide. A reagent fluid supply is coupled to each cuvette to deliver and apply reagent for treatment of the slide. A slide gripper is disposed above the slide processing station and is configured to move the slide in and out of the cuvettes. A screw assembly is disposed adjacent the slide processing station, the screw assembly configured to receive a plurality of slides, wherein rotation of the screw assembly advances the plurality of slides for engagement by the slide gripper.