Cascade 300 Disposable Carbon Filter Cartridges, 8 count (4 x 2 ct) Marvel all edges are rounded to

all edges are rounded to eliminate chewing surfaces

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Designed for mid-size aquariums

Fully submersible internal power filter for aquariums up to 3 gallons

Cascade 300 Disposable Carbon Filter Cartridges, 8 count (4 x 2 ct) Marvel all edges are rounded toThe Cascade Internal Filter disposable carbon filter cartridge is a disposable carbon replacement cartridge designed to fit the Cascade Internal Filter. Quick and easy to change Change out monthly for optimum water quality Ready to use in your Cascade Internal Filter Cartridge Disposable Carbon filter cartridges keep your aquariums water crystal clear by changing your Cascade Filter cartridges regularly. Oops, this item is out of stock! But dont