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Grreat Choice Wire Dog crate$22.99 - 72.99
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  • Top Fin® CF-Series Standard & High-Density Filter Sponges

    Old Price $ 24.99

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    Old Price $ 15.99

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  • Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 375 to 450

    Old Price $ 10.99

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  • Marineland® Micron Filter Cartridge

    Old Price $ 11.99

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  • Top Fin® Element Filter Cartridges

    Old Price $ 7.99

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    Top Fin® Retreat Filter Cartridge - 3pk

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  • Top Fin® Plastic Bio-Balls

    Old Price $ 14.99

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  • Marineland® 2-in-1 Bio-Foam & Pre-Filter - Fits 125 to 275

    Old Price $ 9.99

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  • Top Fin® Silenstream Filter Cartridge - 3pk

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    Top Fin® PF-S Silenstream Aquarium Filter Cartridges

    Old Price $ 6.99 - 17.99

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  • Top Fin® Ceramic Rings

    Old Price $ 14.99

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  • Top Fin® Nitrogen Reducing Filter Pad

    Old Price $ 10.99

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  • Top Fin® Carbon Infused Filter Pad

    Old Price $ 7.99

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  • Marineland® Marineland Micron Filter Cartridge

    Old Price $ 12.99

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  • Top Fin® PF-L Silenstream Aquarium Filter Cartridges - Value Pack

    Old Price $ 19.99

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  • Top Fin® EF-S Element Aquarium Filter Cartridges - 12pk

    Old Price $ 17.99

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  • Top Fin® CN-L Corner Filter Cartridges

    Old Price $ 7.99

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  • Fluval® 407/406 Bio Foam Max

    Old Price $ 8.99

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  • Fluval® 107/6 207/6 Nitrite Resin Infused Pads - 3pk

    Old Price $ 7.99

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  • Fluval® 207/307 & 206/306 Bio-Foam Max Filter Pad - 2pk

    Old Price $ 7.99

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  • Fluval Phosphate Resin Infused Pads

    Old Price $ 10.99

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  • Fluval Phosphate Resin Infused Pads

    Old Price $ 7.99

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  • Fluval® 107/6 207/6 Nitrite Resin Infused Pads - 6pk

    Old Price $ 10.99

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  • Fluval® 107/106 Bio-Foam Max Filter Pad - 2pk

    Old Price $ 6.99

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  • 2 Sizes

    Fluval® Ammonia Remover Pads

    Old Price $ 7.99 - 10.99

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  • Fluval ClearX Media Insert - 4 pack

    Old Price $ 8.99

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  • Top Fin® Retreat™ RF-S Filter Cartridges

    Old Price $ 14.99

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  • Top Fin® IF-M 4-IN-1 Filter Cartridges

    Old Price $ 6.99

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  • Top Fin® IF-S 4-IN-1 Filter Cartridges

    Old Price $ 5.99

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  • Top Fin® Retreat™ RF-L Filter Cartridges

    Old Price $ 14.99

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  • Top Fin® Filter Fiber Pad U-Media

    Old Price $ 7.99

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  • Top Fin® Multi-Stage MF-S Filter Sponges

    Old Price $ 3.49

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  • Top Fin® Carbon Filter Sponges

    Old Price $ 8.99

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  • Top Fin® Carbon Filter Sponges

    Old Price $ 6.99

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  • Top Fin® Universal Clay Bio Balls

    Old Price $ 14.99

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Fish Tank Filter Media

If the aquarium filter can no longer efficiently remove free-floating particulates, organic matter, waste or excess food, it may be time to replace your fish tank's filter media and at PetSmart, we make that easy. Water passing through the filter cartridge, sponge or other media is cleaned by mechanical filtration, or physical removal of waste. Mechanical media traps particles from the aquarium water before reaching a biological media, if present in the tank. Biological filtration uses beneficial bacteria to convert toxic chemicals, like ammonia and nitrites, produced by decomposing fish waste, into less harmful forms of nitrogen. Biological media is simply a habitable place for bacteria to colonize and wait for the water circulation to supply them with oxygen and food. Chemical filtration also removes ammonia and nitrites, as well as other harmful elements like chlorine, copper and certain medications. Be sure to remove these when you are treating the aquarium water for common fish diseases. Activated carbon, often called charcoal, is the most common chemical filter media and often comes in bags or other inserts that can be placed in many different filter systems. Carbon filters also absorb odors and pigments, leaving the water crystal clear. Shop our collection of filter media for aquariums of every size, and find the cartridges, foam pads, bulk media, filter bags, pre-filter accessories and parts you need to keep their aquarium clean and healthy.
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