Marineland Magnum 350 and 220 Filter Sleeves are exactly what you need to turn your Marineland Magnum Filter into an excellent mechanical filter. Prolongs the life of your Magnum Filter Media by removing dirt and waste particles that would prematurely clog your Magnum Filter. The ultiimate Marineland Magnum Aquarium Filter Part for enhancing your Magnum Canister Filter's versatility. Superior aquarium filtration. For best results, rinse or replace filter sleeve monthly.
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