Filter Media

Items 1 to 48 of 533 total

At Big Al’s Pets, we offer the best selection of aquarium filter media, including biological, chemical, and mechanical varieties. These products are essential for ensuring effective aquarium filtration for a healthier fish habitat. Keeping up with aquarium maintenance requires much less time when you use the right filter media since these products are always actively working to create a cleaner, healthier environment for your fish. And when you shop at Big Al’s, you’ll also save time by getting all different types of media you need in one convenient place.

Our selection of aquarium filter media includes over 400 high-quality products. In addition to biological filter media, you’ll also find activated carbon, diatom media, mechanical media, and more. We also carry other accessories you need to properly filter your aquarium, such as filter media bags, replacement cartridges, deionization cartridges, reverse osmosis membranes, etc. With so many options, any fish keeper can find the exact products they need to keep their water clean and their fish happy and healthy.
  • Micron Cartridge for Magnum Canister Filters
    Designed for fast clean-ups and removal of microscopic particles. Polishes water to absolute crystal clarity. Reusable cartridge fits all Marineland Magnum Canister Filters, including the HOT Magnum. Will filter out particles as small as 8 microns.

    Regular Price: USD 10.99

    Sale Price USD 6.99

    Regular Price: USD 10.99

    Sale Price USD 6.99

  • Fluval Zeo-Carb Filter Insert - 150 g - 3 pk
    Premium blend of research grade Fluval Carbon and Fluval Ammonia Remover. Working together, these highly effective media eliminate liquefied impurities, odors and discoloration, while simultaneously removing toxic ammonia, for a clean, healthy aquarium.

    Regular Price: USD 5.99

    Sale Price USD 4.49

    Regular Price: USD 5.99

    Sale Price USD 4.49

  • Eheim Substrat Pro Biological Filter Media - 1 L
    Substrat pro offers perfect colonization conditions to the important purification bacteria through the high bulk density of the spherical shape and the perfect surface structure. Reduces peak nitrite loads, and can be rinsed and re-used several times.

    Regular Price: USD 24.76

    Sale Price USD 14.99

    Regular Price: USD 24.76

    Sale Price USD 14.99

  • Eheim Fine Filter Pads for 2217 Canister Filter - 3 pk
    Eheim's Fine White Filter Pad is used as the last stage of filtration, to polish water of very fine particles before it is returned to the aquarium. Once it has become soiled, it should be replaced to avoid damage to the motor head of the filter.

    Regular Price: USD 18.62

    Sale Price USD 9.99

    Regular Price: USD 18.62

    Sale Price USD 9.99

  • Fluval ClearMax Filter Insert - 100 g - 3 pk
    Fluval Clearmax Phosphate Remover for all filters. It traps phosphate, nitrate and nitrite. It also reduces odours, makes maintenance easier and provided crystal clear water to create ideal conditions for fish.

    Regular Price: USD 13.99

    Sale Price USD 7.99

    Regular Price: USD 13.99

    Sale Price USD 7.99

  • Fluval Bio-Max Rings - 1100 g
    Bring beneficial bacteria into the game with Fluval BioMax 1100g Rings! Get ammonia control when you need it from BigAlsPets.com.

    Regular Price: USD 19.99

    Sale Price USD 16.99

    Regular Price: USD 19.99

    Sale Price USD 16.99

  • Fluval Edge Pre-Filter Sponge
    Exclusively for the Fluval EDGE Power filter, this pre-filter sponge traps fine debris and easily connects to the filter intake so that your small or baby inhabitants are protected from being drawn into the filter.

    Regular Price: USD 2.99

    Sale Price USD 2.49

    Regular Price: USD 2.99

    Sale Price USD 2.49

  • Seachem The Bag - 10" x 5"
    The Bag is an innovative welded filter bag with a durable non-stitched seam. It has a 180 micron mesh, is resistant to bleach, caustics, and acids, and comes with a convenient resealable locking closure.
    USD 8.32
    USD 8.32
  • Fluval Bio-Max Rings - 500 g
    Fluval BioMax bio rings have a complex pore system creating an optimal environment where beneficial bacteria can thrive. They reduce and control ammonia and nitrate. For freshwater and marine environments.

    Regular Price: USD 11.99

    Sale Price USD 6.99

    Regular Price: USD 11.99

    Sale Price USD 6.99

  • Eheim Coarse Filter Pads for 2217 Canister Filter - 2 pk
    Used as a parting layer between the mechanical (EHFIMECH) and biological filter medium (EHFISUBSTRAT/EHFISUBSTRAT PRO). May be rinsed in tank water or dechlorinated tap water and reused to keep it's biological filtering capabilities.

    Regular Price: USD 18.62

    Sale Price USD 9.99

    Regular Price: USD 18.62

    Sale Price USD 9.99

  • Fluval Pre-Filter Media - 750 g
    • This media prevents premature clogging
    • It captures solid waste & organic debris
    • Keeps your water fresh, healthy & clear
    • This saves money by extending filter life
    • Medium/coarse & fresh/marine filtration

    Regular Price: USD 7.99

    Sale Price USD 4.99

    Regular Price: USD 7.99

    Sale Price USD 4.99

  • Eheim Substrat Pro Biological Filter Media - 2 L
    Substrat pro offers perfect colonization conditions to the important purification bacteria through the high bulk density of the spherical shape and the perfect surface structure. Reduces peak nitrite loads, and can be rinsed and re-used several times.

    Regular Price: USD 44.99

    Sale Price USD 28.99

    Regular Price: USD 44.99

    Sale Price USD 28.99

  • Fluval Foam Filter Blocks for FX5/FX6 - 3 pk
    Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration. These inserts also enhance biological filtration.

    Regular Price: USD 13.99

    Sale Price USD 9.99

    Regular Price: USD 13.99

    Sale Price USD 9.99

  • Eheim Substrat Pro Biological Filter Media - 5 L
    Substrat pro offers perfect colonization conditions to the important purification bacteria through the high bulk density of the spherical shape and the perfect surface structure. Reduces peak nitrite loads, and can be rinsed and re-used several times.

    Regular Price: USD 96.99

    Sale Price USD 58.99

    Regular Price: USD 96.99

    Sale Price USD 58.99

  • MarinePure Biofilter Media Block - 8" x 8" x 4"
    • Inert ceramic bio-filtration substrate with up to 90% Open-Flow porosity
    • Rids water of ammonia and nitrites and reduces nitrate levels
    • Thin Bio-Film Technology stimulates growth of beneficial bacteria
    • Lighter and more effective than live rock at 0.5 g/cc density
    • Improves ecosystem quality and reduces tank maintenance
    USD 51.99
    USD 51.99
  • Fluval Water Polishing Pads for FX5/FX6 - 3 pk
    These extra thick micro-fine polyester pads effectively trap micro particles and debris as water passes through. Fluval Water Polishing Pads are ideally used when cloudy water occurs or after tank maintenance to provide crystal clear aquarium water.

    Regular Price: USD 4.69

    Sale Price USD 3.99

    Regular Price: USD 4.69

    Sale Price USD 3.99

  • Fluval Fine Filter Pads for FX5/FX6 - 3 pk
    Fluval Fine Filter Pads are uniquely designed to fit Fluval FX5 and FX6 High Performance Canister Filters. These polyester pads capture small particles and debris that can cloud water, and help maintain clear water.

    Regular Price: USD 4.49

    Sale Price USD 2.99

    Regular Price: USD 4.49

    Sale Price USD 2.99

  • Fluval Bio-Foam Pads for FX5/FX6 - 2 pk
    • Compatible with the Fluval FX5 and FX6
    • Provides exceptional biological and mechanical filtration
    • Porous structure is ideal for the growth of beneficial bacteria
    • Suitable for freshwater and marine applications

    Regular Price: USD 10.99

    Sale Price USD 7.99

    Regular Price: USD 10.99

    Sale Price USD 7.99

  • Eheim Carbon Filter Pads for 2217 Canister Filter - 3 pk
    Eheim Carbon Filter Pads are a great way to polish your aquarium water of debris, odors and discoloration. They should be replaced every 3-4 weeks for optimum results.

    Regular Price: USD 20.10

    Sale Price USD 9.99

    Regular Price: USD 20.10

    Sale Price USD 9.99

  • Marineland Premium Activated Carbon Pads for C-Series Filters - Rite-Size S/T - 2 pk
    Each Marineland Carbon Filter Bag contains 100g of Black Diamond Premium Activated Carbon to remove odors, discoloration, and impurities from your aquarium system. For best results, change carbon every three weeks.

    Regular Price: USD 6.99

    Sale Price USD 4.99

    Regular Price: USD 6.99

    Sale Price USD 4.99

  • Fluval Peat Granules - 21 oz
    • Attain soft, acidic water for all external filters
    • Natural water softener/natural water acidifier
    • Highly concentrated for maximum efficiency
    • Ideal for breeding and rearing most tropical fish
    • Humic acid, tanning agents & trace elements
    USD 9.99
    USD 9.99
  • Seachem Tidal 110 Matrix - 500 ml (Bagged)
    • Treats up to 110 gallons (400 Litres) of water
    • This is an excellent high capacity biofiltration
    • Controls ammonia, nitrites & nitrate levels
    • This improves your aquarium water quality
    • Suitable for freshwater & saltwater set-ups
    USD 7.05
    USD 7.05
  • Eheim Filter Pad Set for the Eheim Pro 4+ Canister Filter
    • The porous foam material collects diverse dirt particles
    • Exceptional colonization setting for bacteria cultures
    • Usable in freshwater and saltwater aquarium filters
    • After gently cleaning, pads can be numerously reused
    • Fine & course pads for mechanical & natural filtration

    Regular Price: USD 16.99

    Sale Price USD 13.99

    Regular Price: USD 16.99

    Sale Price USD 13.99

  • Boyd Chemi-Pure Green - 5.5 oz
    • Activated carbon with ion-exchange resins
    • This enhances plant growth and clarifies water
    • Suitable for freshwater & planted aquariums
    • Stabilises your pH and macronutrient levels
    • Will not strip aquarium micro/macro nutrients
    USD 9.99
    USD 9.99
  • Fluval Ammonia Remover Filter Insert - 180 g - 3 pk
    Fluval Ammonia Remover is a natural ion-exchange media designed to remove toxic ammonia as water passes over it. Controlling ammonia levels reduces stress on fish. For freshwater use only.

    Regular Price: USD 4.99

    Sale Price USD 3.99

    Regular Price: USD 4.99

    Sale Price USD 3.99

  • Aqueon ProFlex 200 Micron Filter Bag - 2 pk
    Replacement filter bags for all ProFlex Modular Sump Filtration models. After water flows through the revolutionary bubble diffuser chamber, it flows through two 200 micron filter socks to remove large particulates from your system.

    Regular Price: USD 14.99

    Sale Price USD 10.99

    Regular Price: USD 14.99

    Sale Price USD 10.99

  • Eheim Torf Peat Pellets - 1L
    EHFI TORF peat pellets will help lower pH and soften your aquarium water. This product will help achieve the results many strive to accomplish. This product will release tannins into your aquarium water, giving it a rich golden appearance.

    Regular Price: USD 16.89

    Sale Price USD 9.99

    Regular Price: USD 16.89

    Sale Price USD 9.99

  • MarinePure Biofilter Media Spheres - 1.5" - 2 qt
    • Inert ceramic bio-filtration substrate with up to 90% Open-Flow porosity
    • Rids water of ammonia and nitrites and reduces nitrate levels
    • Thin Bio-Film Technology stimulates growth of beneficial bacteria
    • Lighter and more effective than live rock at 0.5 g/cc density
    • Improves ecosystem quality and reduces tank maintenance
    USD 28.89
    USD 28.89
  • Fluval Carbon Impregnated Foam Pads for FX5/FX6 - 2 pk
    • Compatible with the Fluval FX5 and FX6
    • Removes discoloration, odors, heavy metals, and pollutants
    • Also provides secondary mechanical filtration
    • Suitable for freshwater and marine applications

    Regular Price: USD 10.99

    Sale Price USD 7.99

    Regular Price: USD 10.99

    Sale Price USD 7.99

  • API Filstar XP Micro Filtration Pads - 3 pk
    • Cotton pad removes minute particles
    • Change once a month or with water change
    • Comes with three filtration pads
    USD 5.79
    USD 5.79
  • Eheim Filter Pad Set for 2071-2075/2074 - 5 pk
    1 prefilter pad and 4 fine filter pads for use with the Eheim Pro 3 2071/2073/20074/2075 external canister filters. Removes debris and particulate matter. Phenol free

    Regular Price: USD 20.39

    Sale Price USD 11.99

    Regular Price: USD 20.39

    Sale Price USD 11.99

  • Poly-Bio Marine Poly Filter Pad - 4" x 8"
    • This is a highly absorbent, quick acting saltwater filter pad
    • Efficiently removes impurities, phosphates & medications
    • This pad is designed to change color when it is exhausted
    USD 7.99
    USD 7.99
  • Eheim Foam Filter Cartridges - 2 pk
    • Excellent mechanical/biological filtration
    • Ideal for Eheim Aquaball (60/130/180)
    • Ideal for Eheim Biopower (160/200/240)
    • Ideal for Eheim Prefilter (Item# 4004320)
    • Rinse for reuse until discolored & brittle
    USD 10.49
    USD 10.49
  • MarinePure Biofilter Media Spheres - 1.5" - 1 gal
    • Inert ceramic bio-filtration substrate with up to 90% Open-Flow porosity
    • Rids water of ammonia and nitrites and reduces nitrate levels
    • Thin Bio-Film Technology stimulates growth of beneficial bacteria
    • Lighter and more effective than live rock at 0.5 g/cc density
    • Improves ecosystem quality and reduces tank maintenance
    USD 52.99
    USD 52.99
  • Hagen Aquaclear Quick Filter Replacement Cartridge - 2 pk
    Aquaclear Quick Filter replacement cartridge. Fine floss exterior with a micron pad interior polishes very fine particles from your aquarium water, giving it a crystal clear appearance. For best results, replace your cartridge every 2-4weeks.

    Regular Price: USD 3.99

    Sale Price USD 3.49

    Regular Price: USD 3.99

    Sale Price USD 3.49

  • Eheim Fine Filter Pads for 2213 Canister Filter - 3 pk
    Eheim's Fine White Filter Pad is used as the last stage of filtration, to polish water of very fine particles before it is returned to the aquarium. Once it has become soiled, it should be replaced to avoid damage to the motor head of the filter.

    Regular Price: USD 11.36

    Sale Price USD 5.99

    Regular Price: USD 11.36

    Sale Price USD 5.99

  • Trigger Systems Filter Sock - 2 pk
    • Great addition to existing mechanical filtration in sumps
    • 4" 2 pack with 100 micron secures to overflow plumbing
    • Helps remove uneaten food, organic waste, and more!
    • Stops snails and larger items from damaging your pump
    • Maintains clean water and lower organic levels with use
    USD 17.99
    USD 17.99
  • Boyd Chemi-Bags - 2 pk
    Double stitched nylon filter bags for use with any type of granular filter media. 3.5" x 7". Includes 2 nylon ties.
    USD 4.09
    USD 4.09
  • Eheim Filter Pad Set for 2026/2028 - 3 pk
    These complete filter pad sets are perfectly tailored to EHEIM external canister filters. Offering both the coarse blue sponge pad, and fine white filter pads for effective particulate filtration.

    Regular Price: USD 16.60

    Sale Price USD 8.99

    Regular Price: USD 16.60

    Sale Price USD 8.99

  • Eheim Filter Bag for 2250/2260/3450/3460
    Filter Media Canister-Eheim. Eheim Filter Bag. Designed to hold granular media of any sort, preventing it from clogging motor head assemblies, while effectively filtering aquarium water.

    Regular Price: USD 12.49

    Sale Price USD 9.39

    Regular Price: USD 12.49

    Sale Price USD 9.39

  • Fluval Biomax Media for U2/U3/U4 - 170 g
    Fluval BioMax bio rings have a complex pore system creating an optimal environment where beneficial bacteria can thrive. They reduce and control ammonia and nitrate. For freshwater and marine environments.

    Regular Price: USD 3.49

    Sale Price USD 2.99

    Regular Price: USD 3.49

    Sale Price USD 2.99

  • Rena Filstar XP Filtration 30 ppi Filter Pads - 2 pk
    Filstar XP Filtration 30 ppi foam pads filter small waste particles, such as sediment and fish waste. Their exclusive open-cell design allows free water flow. Replace pads every 3 months.
    USD 8.89
    USD 8.89
  • MarinePure Biofilter Media Plate - 8" x 8" x 1"
    • Inert ceramic bio-filtration substrate with up to 90% Open-Flow porosity
    • Rids water of ammonia and nitrites and reduces nitrate levels
    • Thin Bio-Film Technology stimulates growth of beneficial bacteria
    • Lighter and more effective than live rock at 0.5 g/cc density
    • Improves ecosystem quality and reduces tank maintenance
    USD 28.99
    USD 28.99
  • Eheim Coarse Filter Pads for 2213 Canister Filter - 2 pk
    Used as a parting layer between the mechanical (EHFIMECH) and biological filter medium (EHFISUBSTRAT/EHFISUBSTRAT PRO). May be rinsed in tank water or dechlorinated tap water and reused to keep it's biological filtering capabilities.

    Regular Price: USD 9.60

    Sale Price USD 4.99

    Regular Price: USD 9.60

    Sale Price USD 4.99

  • Eheim Biological Pre-Filter Cartridges for 2227/2229 - 2 pk
    Foam Pre-Filter for Eheim Canister Filters. A pre-filter will prevent large debris from clogging your filter media; you can easily remove it, rinse it, and put it right back. Using a pre-filter will help prolong both media and filter life.

    Regular Price: USD 11.06

    Sale Price USD 7.99

    Regular Price: USD 11.06

    Sale Price USD 7.99

  • Seapora Blue Bonded Pad - 24" x 15"
    Description Coming Soon!
    USD 6.99
    USD 6.99
  • Eheim Complete Filter Media Kit for 2080
    Replacement media for the Eheim Pro 3 2080 Canister Filter. Contains: 1 coarse filter pad, 2 fine filter pads, 8 liters of Substrat Pro and 4 liters of Ehfimech.

    Regular Price: USD 199.99

    Sale Price USD 106.99

    Regular Price: USD 199.99

    Sale Price USD 106.99

  • Filter Floss - 20 sq ft
    • Dense filter media provides superior mechanical filtration
    • Helps prevent obstructions in the biological media
    • Keeps your aquarium water crystal clear!
    • Can be cut and shaped to fit any filtration system
    • Great for both freshwater and saltwater applications
    USD 11.99
    USD 11.99
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