A recyclable filter cartridge for use in photographic processing has a main tubular housing 11 that encases a core in which a synthetic fiber filtering material 17 is located. The core is accessed by elongated slots 15, 16 formed circumferentially in an outer shell 14 of the housing 11. The slots 15, 16 allow entry of photographic processing chemicals into the core so that, under the influence of an external pump, the processing chemicals may pass through and be filtered by the filtering material 17. There is a tubular outlet 19 for exit of the filtered processing chemicals from the core and for their passage to a processing tank 35. The cartridge may be disassembled by disconnection of a stem tube 12 from the main tubular housing 11 so as to allow manual removal of the used filtering material 17 from the core and the replacement within the core of clean filtering material.