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Disposable Zeolite Cartridges - 2 Per Card
|Lees Disposable Zeolite Cartridge (2-Per Card) is an easy-to-install cartridge that solves the common problem of ammonia build-up that fouls aquarium water and destroys livestock. The Disposable Zeolite Cartridge is designed to fit our Economy, Original or Premium Under Gravel Filters.For optimal performance, it is recommended that you replace your cartridges every 2-3 weeks.|