Specifications: Compatible With: Top Fin Rf-L Filters Filtration Layers: 4-Layer System (Cotton, Activated Carbon, Zeolite Media) Filtration Type: Mechanical, Chemical, Biological Replacement Frequency: Every 4 Weeks (Depending On Aquarium Conditions) Package Options: Available In Multi-Pack Sizes Suitable For Tank Sizes: Small To Large Aquariums: Compatible With Top Fin Aquariums 3 Gallon Easy-Clean With Colorflow* Lighting Aquarium 5 Gallon Easy-Clean Glass Aquarium 5 Gallon Premium Glass Aquarium 5 Gallon Easy-Clean With Colorflow* Lighting Aquarium 8 Gallon Easy-Clean With Colorflow* Lighting Aquarium Dimensions:
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