Filters

Items 1 to 48 of 135 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 139.99

    Regular Price: USD 169.99

    Sale Price USD 139.99

  • 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
  • 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

  • Magnum Internal Polishing 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

  • 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

  • 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

  • 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

  • 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

  • Tom Aquatics Dive Clean Mini Internal Filter
    Powerful mini submersible filter that is ideal for Nano tanks and other small aquariums, as well as for use in reptile tanks. Energy saving compact motor runs on a low 12 Volt power supply for safe operation in water. For freshwater or marine use.

    Regular Price: USD 15.99

    Sale Price USD 13.99

    Regular Price: USD 15.99

    Sale Price USD 13.99

  • 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

  • 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
  • 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 250.49
    USD 250.49
  • 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 222.99
    USD 222.99
  • 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 375.99
    USD 375.99
  • 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 425.99
    USD 425.99
  • 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

  • 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

  • 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
  • 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

  • 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 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 275.99
    USD 275.99
  • 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 324.99
    USD 324.99
  • 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

  • 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 59.99

    Regular Price: USD 84.99

    Sale Price USD 59.99

  • 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

  • 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 366.99
    USD 366.99
  • Tom Aquatics Pre-Filter for Aqua Lifter
    • Suction pre-filter captures free-floating debris
    • Prevents detritus accumulation in your Aqua-Lifter pump
    • Helps ensure optimal pump performance
    • Transparent casing shows when insert requires replacement
    • Installs with standard airline tubing

    Regular Price: USD 2.99

    Sale Price USD 2.69

    Regular Price: USD 2.99

    Sale Price USD 2.69

  • 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

    Regular Price: USD 97.99

    Sale Price USD 79.99

    Regular Price: USD 97.99

    Sale Price USD 79.99

  • Hagen Aquaclear Power Filter - 70
    The AquaClear Power Filters provide mechanical, chemical and biological filtration through their multi-stage filtration system. Filtration volume is up to 7 times larger than comparable Filters. Installation and maintenance are quick, easy and convenient.
    USD 49.99
    USD 49.99
  • Aqueon QuietFlow LED Pro Aquarium Power Filter - 10
    • Features a 5-stage advanced filtration system with an LED filter change indicator
    • This provides mechanical, chemical, biological, wet/dry components & a filter pad
    • Delivers crystal clear water and increased oxygen levels for healthier & active fish
    • This patented design demonstrates near-silent operation & consistent flow rates
    • Auto-start pump requires no priming and automatically restarts if power was lost

    Regular Price: USD 10.99

    Sale Price USD 8.99

    Regular Price: USD 10.99

    Sale Price USD 8.99

  • 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

  • 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 326.49
    USD 326.49
  • Trigger Systems ATO Reservoir - Emerald - 5 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 114.99
    USD 114.99
  • Marineland Emperor Power Filter - 400
    Emperor Filter Systems are advanced aquarium technology at its finest. With a revolutionary two-pump design, flow and filtration efficiencies of the Emperor's are unmatched by other filters in their class.

    Regular Price: USD 65.99

    Sale Price USD 49.99

    Regular Price: USD 65.99

    Sale Price USD 49.99

  • 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

  • Eheim Ecco Comfort Canister Filter - 2232
    • Recommended for tanks up to 35 gallons
    • Has a flow rate of 127 GPH
    • Inlet 12/16mm Outlet 12/16mm
    • Is completely user friendly
    • Has media, hoses & accessories needed for start up

    Regular Price: USD 109.99

    Sale Price USD 98.99

    Regular Price: USD 109.99

    Sale Price USD 98.99

  • Fluval Underwater Filter - U4
    The new Fluval underwater filter with three stage filtration is ideal for use in fresh, marine or reptile environments. Offers a Flip-Top for quick and easy maintenance and an adjustable 3 way flow for output flexibility.

    Regular Price: USD 69.99

    Sale Price USD 59.99

    Regular Price: USD 69.99

    Sale Price USD 59.99

  • JNS Fluidized Media Reactor - FR-1E
    • Powerful supplementary filtration for marine and reef aquariums
    • Use to eliminate odors, discoloration, nitrates, phosphates, etc.
    • Great for activated carbon, granular ferrous oxide, and more!
    • Up-flow design maximizes water-to-media contact time
    • Cell-cast acrylic construction and precision CNC machined parts

    Regular Price: USD 79.99

    Sale Price USD 59.99

    Regular Price: USD 79.99

    Sale Price USD 59.99

  • 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

  • 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

  • Aqueon QuietFlow LED Pro Aquarium Power Filter - 50
    • Features a 5-stage advanced filtration system with an LED filter change indicator
    • This provides mechanical, chemical, biological, wet/dry components & a filter pad
    • Delivers crystal clear water and increased oxygen levels for healthier & active fish
    • This patented design demonstrates near-silent operation & consistent flow rates
    • Auto-start pump requires no priming and automatically restarts if power was lost

    Regular Price: USD 25.99

    Sale Price USD 19.99

    Regular Price: USD 25.99

    Sale Price USD 19.99

  • 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 99.99

    Regular Price: USD 129.99

    Sale Price USD 99.99

  • Fluval Underwater Filter - U3
    The new Fluval underwater filter with three stage filtration is ideal for use in fresh, marine or reptile environments. Offers a Flip-Top for quick and easy maintenance and an adjustable 3 way flow for output flexibility.

    Regular Price: USD 49.99

    Sale Price USD 39.99

    Regular Price: USD 49.99

    Sale Price USD 39.99

  • Tetra Whisper Power Filter - EX70
    Ready to go right out of the box, the EX Series was designed with simplicity and convenience in mind. These powerful systems provide multi-stage filtration to keep aquariums clean and clear!

    Regular Price: USD 39.99

    Sale Price USD 29.99

    Regular Price: USD 39.99

    Sale Price USD 29.99

  • Lee's Under Gravel Filter - 15/20 gal
    Designed with adjustable 1" diameter uplift tubes for better water circulation and multiple-plate construction for easy installation. Advanced design allows a separate plate installation and also has optional flow-thru set-up for use with a power head.

    Regular Price: USD 12.99

    Sale Price USD 9.99

    Regular Price: USD 12.99

    Sale Price USD 9.99

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