Filters

Items 1 to 48 of 138 total

Despite having over 100 filters for sale, Big Al’s Pets make it easy to find the perfect match for your aquarium. Our aquarium filters are easily sorted into categories so you can provide your fish with the best filtration system for their needs. You’ll find everything from power filters to canister filters to modular filters on our site. Plus, we carry under-gravel filters, sponge filters, sump filters, and fluidized bed filters to accommodate any application or setup. Each one provides high-quality filtration to ensure the best water quality and clarity for your fish.

When choosing an aquarium filter, make sure you take into account the many factors which can affect filter performance. The size of your tank is a major determining factor in the type of filter that you require. For example, some larger tanks employ multiple filters to achieve the best water conditions. You’ll also need to consider other factors, such as how many and what types of fish you have in your aquarium. Take a closer look at our amazing selection of aquarium filters, and you’re sure to find one that meets your specific needs.
  • Eheim Classic Canister Filter with Media - 2217
    • Recommended for tanks up to 160 gallon
    • The flow rate is 264 GPH
    • Inlet 16/22mm and Outlet 12/16mm
    • Simple and efficient canister filter design
    • Includes all media, hoses and accessories required for start up

    Regular Price: USD 169.99

    Sale Price USD 149.99

    Regular Price: USD 169.99

    Sale Price USD 149.99

  • Fluval FX6 High Performance Canister Filter
    • Ultra powerful canister filter boasts a 563 gph flow rate!
    • Smart Pump Technology (SPT) ensures optimal performance
    • Includes all media required for highly effective filtration
    • Mega capacity filter holds 5.9 L of filter media
    • Integrated dials remind you when maintenance is required
    USD 339.99
    USD 339.99
  • Fluval FX4 High Performance Canister Filter
    • Powerful canister filter has a 450 gph flow rate on 30 watts
    • Smart Pump Technology (SPT) ensures optimal performance
    • Includes all the media required for highly effective filtration
    • This mega capacity filter holds 3.9 L (1 gal) of filter media
    • Suitable for freshwater or marine aquariums up to 250 gal
    USD 279.99
    USD 279.99
  • Eheim Pro 3 2080 Canister Filter
    This filter system is filled with the convenient priming support at "the push of a button" and immediately the system starts working. Thanks to the easy-to-use filter baskets, cleaning or replacement of the filter media is much easier.

    Regular Price: USD 479.99

    Sale Price USD 379.99

    Regular Price: USD 479.99

    Sale Price USD 379.99

  • Marineland Magnum Polishing Internal Canister Filter
    • Foam Filter Sleeve, water polishing & 3-stage filtration
    • This includes the built-in Magnum Micron Cartridge
    • Includes one Marineland Rite-Size JH Floss Sleeve
    • Black Diamond Premium Activated Carbon included
    • This filter provides the option of modifying your media

    Regular Price: USD 49.99

    Sale Price USD 39.99

    Regular Price: USD 49.99

    Sale Price USD 39.99

  • Eheim Surface Skimmer
    Use on the intake side of your canister filter. Quietly removes surface sludge and protein build-up. This product can hook up to any canister filter with a flow rate up to 200 gph.

    Regular Price: USD 73.09

    Sale Price USD 59.99

    Regular Price: USD 73.09

    Sale Price USD 59.99

  • Skim350 Micro Surface Skimmer
    • Designed for use in aquariums up to 92 gallons
    • Removes dust, oily films, and microorganisms from water's surface
    • Promotes proper gas exchange for a healthier aquarium
    • Driven by 80 gph pump with adjustable flow control
    • Self-adjusting float compensates for water evaporation

    Regular Price: USD 34.99

    Sale Price USD 24.99

    Regular Price: USD 34.99

    Sale Price USD 24.99

  • Tom Aquatics Rapids Mini Canister Filter - C-80
    The Rapids 3-Stage Canister Filter has a self priming, top mounted sealed motor. The canister is lightweight enough to hang directly on the back of the aquarium. Provides efficient mechanical, chemical and biological filtration.

    Regular Price: USD 34.99

    Sale Price USD 27.99

    Regular Price: USD 34.99

    Sale Price USD 27.99

  • Pro 4e+ Canister Filter - 350
    • Maintains powerful performance and high-tech capabilities
    • Includes Constant Flow and Electronic Output Control features
    • Electronic Air Indicator, 12-Hour Bio and Stream Functions
    • New Range Xtender Function prolongs time between cleanings
    • Features a lower power consumption and an all black exterior

    Regular Price: USD 419.99

    Sale Price USD 339.99

    Regular Price: USD 419.99

    Sale Price USD 339.99

  • Fluval Surface Skimmer
    The Fluval aquarium surface skimmer draws water from the surface of the aquarium eliminating undesirable surface films.

    Regular Price: USD 12.99

    Sale Price USD 8.99

    Regular Price: USD 12.99

    Sale Price USD 8.99

  • Seachem Tidal Power Filter 110
    • Upper most blue pegged integrated maintenance alert feature
    • Integrated self priming pump; thus no priming is required
    • Features a high capacity 3.2 L filter basket for optimal filtration
    • This super silent model is ideal for up to 110 gallon aquariums
    • Includes adjustable upper flow rate and lower intake knobs
    USD 82.00
    USD 82.00
  • Pro Clear Aquatic Systems Freedom 4-in-1 Sump 300 - 37"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Refugium can also be converted to a wet/dry trickle filter
    • Adjustable flow-gate through refugium section of the sump
    USD 398.88
    USD 398.88
  • Pro Clear Aquatic Systems Freedom 4-in-1 Sump 100 - 16" (Cube)
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Refugium can also be converted to a wet/dry trickle filter
    • Adjustable flow-gate through refugium section of the sump
    USD 298.88
    USD 298.88
  • Quick-Draw Corner Aquarium Filter
    Small corner filter ideal for small tanks or fry tanks. Includes: air stone, water outlet tube, 5 feet of high quality kink resistant airline tubing, activated carbon and filter floss. All thats needed is an air pump.

    Regular Price: USD 5.99

    Sale Price USD 5.39

    Regular Price: USD 5.99

    Sale Price USD 5.39

  • Seachem Tidal Power Filter 55
    • Upper most blue pegged integrated maintenance alert feature
    • Integrated self priming pump; thus no priming is required
    • Features a high capacity 1.2 L filter basket for optimal filtration
    • This super silent model is ideal for up to 55 gallon aquariums
    • Includes adjustable upper flow rate and lower intake knobs
    USD 54.00
    USD 54.00
  • Eheim Pro 3 Thermofilter - 2180
    Eheim 2180 Thermofilter comes with a stainless steel heater built right into the bottom of the filter! This filter will ensure even heating and effective filtration of your aquarium water with no unsightly sumbersible heaters needed. Media not Included.

    Regular Price: USD 589.99

    Sale Price USD 469.99

    Regular Price: USD 589.99

    Sale Price USD 469.99

  • Pro Clear Aquatic Systems Freedom 4-in-1 Sump 400 - 45"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Refugium can also be converted to a wet/dry trickle filter
    • Adjustable flow-gate through refugium section of the sump
    USD 448.88
    USD 448.88
  • Pro Clear Aquatic Systems Freedom Reef Sump 100 - 24"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Adjustable flow-gate through the media container section
    • Bubble diffuser tubes help silence bubbles as water enters
    USD 198.88
    USD 198.88
  • E-X-T Aquarium Canister Filter
    • Powerful 4-stage canister filter for aquariums up to 55 gallons
    • Driven by a 210 gph in-line pump instead of a bulky motorhead
    • Includes four large media trays pre-loaded with premium media
    • Perform canister maintenance without stopping water circulation!
    • Ideal for freshwater, saltwater, reef, and terrarium applications
    USD 131.99
    USD 131.99
  • Hagen AquaClear Quick Filter Powerhead Attachment
    The Large Quick Filter attachment converts AquaClear Power heads into powerful filters for rapid removal of most particulate waste. The extra large central core holds an ample supply of granular filter material for supplementary filtration.

    Regular Price: USD 8.99

    Sale Price USD 7.99

    Regular Price: USD 8.99

    Sale Price USD 7.99

  • Seachem Tidal Power Filter 75
    • Upper most blue pegged integrated maintenance alert feature
    • Integrated self priming pump; thus no priming is required
    • Features a high capacity 1.9 L filter basket for optimal filtration
    • This super silent model is ideal for up to 75 gallon aquariums
    • Includes adjustable upper flow rate and lower intake knobs
    USD 68.00
    USD 68.00
  • Lee's Fish Saver Elbows - 1" - 2 pk
    • These elbows fit any 1" uplift tube securely
    • Can be a replacement or an addition part
    • Suitable for under gravel filters systems
    • These elbows are designed clear
    USD 2.99
    USD 2.99
  • Economy Corner Filter
    Ideal for small aquariums and aquarium kits. Lee's low-cost, high-quality Economy Corner filter keeps tanks sparkling clean without the use of an airstone.

    Regular Price: USD 2.49

    Sale Price USD 1.99

    Regular Price: USD 2.49

    Sale Price USD 1.99

  • Ista Surface Skimmer
    • Eliminates surface films caused by protein and organisms
    • Improves the exchange of oxygen and penetration of light
    • Self-floating design adjusts according to the water level
    • Marine aquariums with no surface overflow benefit greatly
    • Easy to install and maintain - fits all types of canister filters

    Regular Price: USD 9.99

    Sale Price USD 6.99

    Regular Price: USD 9.99

    Sale Price USD 6.99

  • Pro Clear Aquatic Systems Freedom 4-in-1 Sump 200 - 32"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Refugium can also be converted to a wet/dry trickle filter
    • Adjustable flow-gate through refugium section of the sump
    USD 348.88
    USD 348.88
  • SuperClean 10 Internal Power Filter
    • Compact internal power filter for aquariums up to 10 gallons
    • Includes Crystal Bio-Chem Zorb cartridge for superior filtration
    • Quickly eliminates unwanted debris, discoloration, and odors
    • Brilliant design enables effortless installation and maintenance
    • Suitable for use in both freshwater and saltwater aquariums
    USD 9.99
    USD 9.99
  • Penn Plax Cascade 170 Internal Filter
    These slim, easy to maintain internal filters provide great Physical, Chemical and Biological filtration for any Marine or Tropical aquarium. Comes with a directional flow spout, completely submersible motor with aeration control and an air filter.

    Regular Price: USD 7.99

    Sale Price USD 6.99

    Regular Price: USD 7.99

    Sale Price USD 6.99

  • Kent Marine Cyclone Media Reactor
    • Multi-purpose reactor for fluidized and traditional media setups
    • Creates a powerful vortex to maximize water-to-media contact time
    • Versatile reactor is great for hang-on and in-sump applications
    • Includes a reliable 98 gph water pump with adjustable flow rate
    • For freshwater aquariums up to 300 gallons, saltwater up to 150 gallons

    Regular Price: USD 63.99

    Sale Price USD 54.99

    Regular Price: USD 63.99

    Sale Price USD 54.99

  • Pro Clear Aquatic Systems Freedom Reef Sump 300 - 37"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Adjustable flow-gate through the media container section
    • Bubble diffuser tubes help silence bubbles as water enters
    USD 298.88
    USD 298.88
  • Pro Clear Aquatic Systems Freedom Reef Sump 200 - 32"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Adjustable flow-gate through the media container section
    • Bubble diffuser tubes help silence bubbles as water enters
    USD 248.88
    USD 248.88
  • Pro Clear Aquatic Systems Freedom Reef Sump 400 - 45"
    • Quiet, sturdy, easy to maintain saltwater filtration system
    • The Eurobrace around the rim of the sump prevents bowing
    • Notches for holding wires, dosing tubes & return pump tubing
    • Adjustable flow-gate through the media container section
    • Bubble diffuser tubes help silence bubbles as water enters
    USD 348.88
    USD 348.88
  • Eheim Classic Canister Filter with Media - 2213
    • Recommended for tanks up to 65 gallon
    • The flow rate is 116 GPH
    • Inlet 12/16mm and Outlet 12/16mm
    • Simple and efficient canister filter design
    • Includes all media, hoses and accessories required for start up
    USD 97.99
    USD 97.99
  • Marineland Flow Spout for Undergravel Filters
    Parts for Perfecto Undergravel filters

    Regular Price: USD 1.18

    Sale Price USD 0.99

    Regular Price: USD 1.18

    Sale Price USD 0.99

  • Tetra Whisper In-tank Filter - 3i
    The Whisper In-tank 3i filter mounts on the inside of the aquarium, making it possible to place your tank flush against a wall. It uses air bubbles to move water up the airlift tube and through the filter cartridge making it ideal for keeping small fish.

    Regular Price: USD 12.99

    Sale Price USD 9.99

    Regular Price: USD 12.99

    Sale Price USD 9.99

  • Tetra Whisper Power Filter - 60
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 60 gal (330 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 37.99
    USD 37.99
  • Tetra Whisper Power Filter - 40
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 40 gal (210 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 26.99
    USD 26.99
  • Eheim Classic Canister Filter with Media - 2215
    • Recommended for tanks up to 95 gallon
    • The flow rate is 164 GPH
    • Inlet 12/16mm and Outlet 12/16mm
    • Simple and efficient canister filter design
    • Includes all media, hoses and accessories required for start up

    Regular Price: USD 129.99

    Sale Price USD 119.99

    Regular Price: USD 129.99

    Sale Price USD 119.99

  • Tetra Whisper Power Filter - 20
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 20 gal (105 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 18.99
    USD 18.99
  • Pro 4+ Canister Filter - 350
    • Maintains the performance and efficiency of it's predecessors
    • Still implements self-priming, prefilter, and safety adapters!
    • New Range Xtender Function lengthens time between cleanings
    • "Xtender" button helps in the event that fine filter-media clogs
    • Features a lower power consumption and an all black exterior

    Regular Price: USD 269.99

    Sale Price USD 229.99

    Regular Price: USD 269.99

    Sale Price USD 229.99

  • Magniflow Canister Filter - 160
    • Multi-stage filter ideal aquariums up to 30 gallons in size
    • With a maximum flow rate of 160 gph at a mere 12 watts
    • Fantastic for both freshwater and saltwater applications
    • Built-in quick prime button for easy installation and set up
    • Water-tight canister lid with valve blocks for quick release

    Regular Price: USD 99.99

    Sale Price USD 69.99

    Regular Price: USD 99.99

    Sale Price USD 69.99

  • Tetra Whisper Power Filter - 30
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 30 gal (145 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 22.99
    USD 22.99
  • Marineland Multi-Stage Canister Filter - C-530
    • Designed to handle large water volumes and heavy waste loads
    • Stress free maintenance and virtually no media by-pass
    • Highly effective multi-stage filtration
    • All media and hosing included
    • Great for freshwater and saltwater applications

    Regular Price: USD 219.99

    Sale Price USD 174.99

    Regular Price: USD 219.99

    Sale Price USD 174.99

  • Trigger Systems ATO Reservoir - Ruby - 10 gal
    • Matches the color and design of the Ruby Sump
    • Alleviates the burden of manually refilling water
    • Ideal for topping off evaporated aquarium water
    • Features water level markings engraved on the side
    • Included lid to helps prevent rapid evaporation
    USD 169.99
    USD 169.99
  • Eheim Classic Canister Filter with Valve Set - 2262
    • Recommended for tanks up to 500 gallon
    • The flow rate is 900 GPH
    • Inlet 25/34mm and Outlet 16/22mm
    • Bonus double tap connectors ($ value)
    • Includes hoses and accessories (requires 18L media sold separately)

    Regular Price: USD 479.99

    Sale Price USD 449.99

    Regular Price: USD 479.99

    Sale Price USD 449.99

  • Trigger Systems ATO Reservoir - Emerald - 10 gal
    • Matches the color and design of the Emerald Sump
    • Alleviates the burden of manually refilling water
    • Ideal for topping off evaporated aquarium water
    • Features water level markings engraved on the side
    • Included lid to helps prevent rapid evaporation
    USD 169.99
    USD 169.99
  • Classic Canister Filter with Media - 2211
    • Large filter canister for long service life
    • Suitable for aquarium sizes up to 40 gallons
    • Equipped with filter sponges and/or loose filter media
    • Balanced pump output to canister volume
    • Ensures optimum conditions in your aquarium

    Regular Price: USD 84.99

    Sale Price USD 69.99

    Regular Price: USD 84.99

    Sale Price USD 69.99

  • Trigger Systems ATO Reservoir - Ruby - 5 gal
    • Matches the color and design of the Ruby Sump
    • Alleviates the burden of manually refilling water
    • Ideal for topping off evaporated aquarium water
    • Features water level markings engraved on the side
    • Included lid to helps prevent rapid evaporation
    USD 114.99
    USD 114.99
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