Filters

Items 1 to 48 of 134 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 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 9.99

    Regular Price: USD 12.99

    Sale Price USD 9.99

  • 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

  • Hagen Aquaclear Power Filter - 20
    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 25.99
    USD 25.99
  • Hagen Aquaclear Power Filter - 30
    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 32.99
    USD 32.99
  • Aquaclear Power Filter - 50
    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 37.99
    USD 37.99
  • 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
  • Hagen Aquaclear Power Filter - 110
    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 79.99
    USD 79.99
  • Fluval Underwater Filter - U1
    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 flexibilty.
    USD 29.99
    USD 29.99
  • Fluval Underwater Filter - U2
    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 flexibilty.
    USD 39.99
    USD 39.99
  • 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 flexibilty.
    USD 49.99
    USD 49.99
  • 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 flexibilty.
    USD 69.99
    USD 69.99
  • Tetra Whisper Internal Power Filter - 40i
    Whisper In-Tank Filters mount on the inside of your aquarium, making it possible to place the tank flush against the wall. The In-Tank Filter will function in as little as 2 inches of water, making it ideal for turtle tanks, or for creating a waterfall.

    Regular Price: USD 25.99

    Sale Price USD 19.99

    Regular Price: USD 25.99

    Sale Price USD 19.99

    Out of stock

  • Tetra Whisper Internal Power Filter - 20i
    Whisper In-Tank Filters mount on the inside of your aquarium, making it possible to place the tank flush against the wall. The In-Tank Filter will function in as little as 2 inches of water, making it ideal for turtle tanks, or for creating a waterfall.

    Regular Price: USD 17.99

    Sale Price USD 15.99

    Regular Price: USD 17.99

    Sale Price USD 15.99

  • 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 11.69

    Regular Price: USD 12.99

    Sale Price USD 11.69

  • Tetra Whisper Power Filter - EX20
    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 18.49

    Sale Price USD 15.99

    Regular Price: USD 18.49

    Sale Price USD 15.99

  • Tetra Whisper Power Filter - EX30
    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 22.39

    Sale Price USD 19.99

    Regular Price: USD 22.39

    Sale Price USD 19.99

  • Tetra Whisper Power Filter - EX45
    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 29.99

    Sale Price USD 24.99

    Regular Price: USD 29.99

    Sale Price USD 24.99

  • 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

  • Tetra Whisper Power Filter - PF10
    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!
    USD 15.99
    USD 15.99
  • JNS STAR Series Sulfur Based Biodenitrator - SSR-2
    • Reduces nitrate levels in freshwater, marine, and reef aquariums
    • Sulfur media and autotrophic bacteria create a denitrifying effect
    • User-friendly - easy to assemble, install, and operate
    • Powered by a reliable and energy-efficient Sicce Syncra pump
    • Durable acrylic construction with high quality SCH 80 PVC fittings
    USD 279.99
    USD 279.99
  • JNS STAR Series Sulfur Based Biodenitrator - SSR-3
    • Reduces nitrate levels in freshwater, marine, and reef aquariums
    • Sulfur media and autotrophic bacteria create a denitrifying effect
    • User-friendly - easy to assemble, install, and operate
    • Powered by a reliable and energy-efficient Sicce Syncra pump
    • Durable acrylic construction with high quality SCH 80 PVC fittings
    USD 549.99
    USD 549.99
  • 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
    USD 79.99
    USD 79.99
  • JNS Fluidized Media Reactor - FR-2E
    • 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
    USD 109.99
    USD 109.99
  • JNS Fluidized Internal Biopellet Reactor - Omega-1
    • Controls nitrate and phosphate levels in marine/reef aquariums
    • Accelerates the reproduction of beneficial denitrifying bacteria
    • Powered by reliable and energy-efficient Sicce Syncra 0.5 pump
    • Features durable cell-cast acrylic construction for longevity
    • User-friendly - easy to assemble, install, and operate
    USD 119.99
    USD 119.99
  • JNS Fluidized Internal Biopellet Reactor - Omega-2
    • Controls nitrate and phosphate levels in marine/reef aquariums
    • Accelerates the reproduction of beneficial denitrifying bacteria
    • Powered by reliable and energy-efficient Sicce Syncra 1.5 pump
    • Features durable cell-cast acrylic construction for longevity
    • User-friendly - easy to assemble, install, and operate
    USD 149.99
    USD 149.99
  • Two Little Fishies NPX Screens for Phosban Reactors - 2 pk
    • Converts your Phosban Reactor for use with NPX Bioplastics Media
    • Prevents pelletized medias from passing through dispersion plates
    • Screens can be cut to fit various cylindrical reactors
    USD 1.99
    USD 1.99
  • Marineland Penguin BIO-Wheel Power Filter - 100B
    • Powerful multi-stage filtration for aquariums up to 20 gallons
    • Generates a 100 gph flow rate at an energy-efficient 7 watts
    • Patented BIO-Wheel eliminates toxic ammonia and nitrite!
    • Equally capable in freshwater and saltwater environments
    • Includes BIO-Wheel, filter cartridge, and 3-year warranty
    USD 23.99
    USD 23.99
  • Marineland Penguin BIO-Wheel Power Filter - 150B
    • Powerful multi-stage filtration for aquariums up to 30 gallons
    • Generates a 150 gph flow rate at an energy-efficient 7.5 watts
    • Patented BIO-Wheel eliminates toxic ammonia and nitrite!
    • Equally capable in freshwater and saltwater environments
    • Includes BIO-Wheel, filter cartridge, and 3-year warranty
    USD 29.99
    USD 29.99
  • Marineland Penguin BIO-Wheel Power Filter - 200B
    • Powerful multi-stage filtration for aquariums up to 50 gallons
    • Generates a 200 gph flow rate at an energy-efficient 8 watts
    • Patented BIO-Wheel eliminates toxic ammonia and nitrite!
    • Equally capable in freshwater and saltwater environments
    • Includes BIO-Wheel, filter cartridge, and 3-year warranty

    Regular Price: USD 34.99

    Sale Price USD 24.99

    Regular Price: USD 34.99

    Sale Price USD 24.99

  • Marineland Penguin BIO-Wheel Power Filter - 350B
    • Powerful multi-stage filtration for aquariums up to 70 gallons
    • Generates a 350 gph flow rate at an energy-efficient 9 watts
    • Patented BIO-Wheel eliminates toxic ammonia and nitrite!
    • Equally capable in freshwater and saltwater environments
    • Includes BIO-Wheels, filter cartridges, and 3-year warranty

    Regular Price: USD 45.49

    Sale Price USD 34.99

    Regular Price: USD 45.49

    Sale Price USD 34.99

  • 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

  • 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.
    USD 12.99
    USD 12.99
  • Lee's Under Gravel Filter - 20 Long/29 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.
    USD 15.99
    USD 15.99
  • 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
  • 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
  • API Filstar Canister Filter - XP-S
    • Recommended for aquariums up to 45 gallons
    • Powerful 250 gph flow rate
    • Self-priming system for easy start-up
    • Designed for bypass-free water circulation
    • Includes all media, hoses, and accessories
    USD 99.99
    USD 99.99
  • API Filstar Canister Filter - XP-M
    • Recommended for aquariums up to 75 gallons
    • Powerful 300 gph flow rate
    • Self-priming system for easy start-up
    • Designed for bypass-free water circulation
    • Includes all media, hoses, and accessories
    USD 109.99
    USD 109.99
  • API Filstar Canister Filter - XP-L
    • Recommended for aquariums up to 175 gallons
    • Powerful 350 gph flow rate
    • Self-priming system for easy start-up
    • Designed for bypass-free water circulation
    • Includes all media, hoses, and accessories
    USD 159.99
    USD 159.99
  • Lifegard Aquatics Heater Module - Triple Capacity
    Provides stable temperature by recirculating aquarium water continuously around heater element. Clear cap to view "On" light of heater. Overflow pipe automatically vents air from chamber for safe operation. Aquarium heater is not included with module.
    USD 79.99
    USD 79.99
  • Two Little Fishies O-Ring for Phosban Reactor 150
    Replacement O-Rings for the Two Little Fishies Phosban Reactors

    Regular Price: USD 2.99

    Sale Price USD 2.49

    Regular Price: USD 2.99

    Sale Price USD 2.49

  • Two Little Fishies O-Ring for Phosban Reactor 550
    Replacement O-Rings for the Two Little Fishies Phosban Reactors

    Regular Price: USD 3.99

    Sale Price USD 3.49

    Regular Price: USD 3.99

    Sale Price USD 3.49

  • 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

    Out of stock

  • Two Little Fishies Foam Disks for PhosBan Reactor 550 - 2 pk
    Reticulated foam sponges used to replace the original parts from Two Little Fishies Phosban Reactors. These replacement sponges may also be used for dividing the column in a reactor to segregate different types of chemical filter media.

    Regular Price: USD 4.99

    Sale Price USD 4.49

    Regular Price: USD 4.99

    Sale Price USD 4.49

  • Two Little Fishies Phosban Reactor - 550
    Phosban Reactors were designed with the uplflow principle to achieve the most effecient use of PhosBan or other chemical filter media. They force even distribution of water through the media, and prevent channeling.

    Regular Price: USD 85.14

    Sale Price USD 74.99

    Regular Price: USD 85.14

    Sale Price USD 74.99

  • Two Little Fishies Extension Kit for PhosBan Reactor 150
    This kit contains all the parts needed to make a flexible and space-saving pipe connection for installing the PhosBan Reactor hanging on the back of an aquarium, or on the side of a filter sump.
    USD 3.99
    USD 3.99
  • Two Little Fishies Foam Disks for PhosBan Reactor 150 - 2 pk
    Reticulated foam sponges used to replace the original parts from Two Little Fishies Phosban Reactors. These replacement sponges may also be used for dividing the column in a reactor to segregate different types of chemical filter media.
    USD 2.99
    USD 2.99
  • 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 57.59

    Regular Price: USD 63.99

    Sale Price USD 57.59

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