Replacement medium and accessories for your Magnum Canister Filter by Marineland. Rite-Size U Bonded Foam Sleeves (3-pack for Magnum 250) Designed with a fine mesh foam which traps and holds dirt and debris. The foam sleeve has an open cell construction that promotes water flow without impairing overall filter performance. For best results, change sleeve monthly. Fits all H.O.T. Magnum Canister Filters. Micron Cartridge Water polishing filter for fast cleanups and removal of microscopic particles. Reusable cartridge works with or without diatom powder. Filters out particles down to approximately 8 microns in size. Fits all Magnum Canister Filters. Magnum Rite-Size Bonded Filter Sleeve (3-pack for Magnum 350) Specially designed to prolong the life of filter media by reducing the accumulation of waste and dirt particles which can prematurely clog a filter. For best results, rinse or replace sleeve monthly. Custom designed for Magnum 220/350 Media Container and Micron Cartridge. Magnum Quick-Disconnect 5/8" Double Valve Makes canister service and removal fast, dry and easy. Allows shut-off from both aquarium and canister. Regulated water flow. Installs in minutes on new and existing set-ups. 1/2" fits Magnum 200/220 or any 1/2" I.D. hose. Carbon/Media Container For use with activated carbon or other media. Designed for continuous duty filtration and maximum efficiency. Fits Magnum 220 & 350 canister filters.