Abstract: An apparatus for use in the development of photographic film comprising a tank for holding a substantially constant temperature bath. Two axles carrying wheels or rollers thereon are journaled in the side walls of the tank. The first axle and thereby wheels or rollers attached thereto is driven by a motor. The second axle has a plurality of positions relative to the first where it may be journaled. Thus the apparatus may be adapted to receive a plurality of sizes of drum processors used in the processing of photographic film by variously positioning the second axle. Thus the drum processor resting on the wheels is rotated through the bath as the driven axle is turned to thus maintain the processor and its contents near the bath temperature.