Filters

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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.
  • Lee's Under Gravel Filter - 20 Long/29 gal
    • Turn your gravel bed into a biological filter
    • Includes plates, airline tubing & uplift tubes
    • Includes air diffusers and carbon cartridges
    • Adjustable 1" uplift tubes for a better flow
    • This Filter could be used with a Powerhead
    USD 17.99
    USD 17.99
  • Lee's Under Gravel Filter - 15/20 gal
    • Turn your gravel bed into a biological filter
    • Includes plates, airline tubing & uplift tubes
    • Includes air diffusers and carbon cartridges
    • Adjustable 1" uplift tubes for a better flow
    • This Filter could be used with a Powerhead
    USD 16.99
    USD 16.99
  • Lee's 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.
    USD 3.99
    USD 3.99
  • 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.
    USD 13.99
    USD 13.99
  • 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.
    USD 74.99
    USD 74.99
  • 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.
    USD 56.99
    USD 56.99
  • 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 flexibility.
    USD 44.99
    USD 44.99
  • Aqueon ProFlex Hang-On Overflow Box - 110
    The Aqueon ProFlex Hang-On Overflows are for use in aquariums that would benefit from sump filtration, but lack pre-drilled holes for sump intake and return. Available in models suitable for aquariums up to 400 gallons in size.
    USD 79.99
    USD 79.99

    Out of stock

  • Trigger Systems ATO Reservoirs
    • Matches the color and design of the Crystal 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

    Price From: USD 99.99

    Price From: USD 99.99

    Out of stock

  • Zoo Med Nano External Canister Filters
    • External canister filter for aquatic habitats up to 50 gallons
    • Keeps water clear with 3 highly efficient stages of filtration
    • Provides a maximum flow rate of 200 gph - fully adjustable!
    • With all parts and media - no additional purchases required!
    • Designed for easy installation, operation, and maintenance

    Price From: USD 129.99

    Price From: USD 129.99

  • Zoo Med Nano External Canister Filters
    • External canister filter for aquatic habitats up to 10 gallons
    • Keeps water clear with 3 highly efficient stages of filtration
    • Provides a maximum flow rate of 80 gph - fully adjustable!
    • With all parts and media - no additional purchases required!
    • Designed for easy installation, operation, and maintenance

    Price From: USD 44.99

    Price From: USD 44.99

  • Trigger Systems Emerald Sumps
    • Premium quality sump made with rounded, flame-polished acrylic
    • Includes a full top support brace for added sturdiness and durability
    • Features dedicated skimmer, refugium, and return sections
    • Includes 100 micron filter sock to provide effective fine filtration
    • Emerald coloring blocks light to prevent unwanted algae growth

    Price From: USD 324.99

    Price From: USD 324.99

    Out of stock

  • Trigger Systems Ruby Sumps
    • Premium quality sump made with rounded, flame-polished acrylic
    • Includes a full top support brace for added sturdiness and durability
    • Features dedicated skimmer, refugium, and return sections
    • Includes 100 micron filter socks to provide effective fine filtration
    • Ruby red coloring blocks light to prevent unwanted algae growth

    Price From: USD 324.99

    Price From: USD 324.99

  • Trigger Systems Crystal Sumps
    • Premium quality sump made with rounded, flame-polished acrylic
    • Includes a full top support brace for added sturdiness and durability
    • Features dedicated skimmer, refugium, and return sections
    • Includes 100 micron filter sock to provide effective fine filtration
    • Can be used as a berlin style sump or as a refugium sump

    Price From: USD 249.99

    Price From: USD 249.99

  • Hydor Professional External Filters
    • Multi-stage canister filter for aquariums up to 40 gallons
    • Delivers 160 gph of filtering efficiency at a modest 11 watts
    • Great for both freshwater and saltwater applications
    • Integrated priming pump allows effortless, push-button startup
    • Pre-loaded with biological and mechanical filter media!

    Price From: USD 119.95

    Price From: USD 119.95

    Out of stock

  • Aqueon QuietFlow Internal Filters
    • Delivers highly effective 3-stage filtration
    • Ideal for aquariums and terrariums up to 10 gallons
    • Directional return pipe allows horizontal or vertical mounting
    • Easy-to-use flow rate adjuster enables precise output control
    • Includes a limited lifetime manufacturer's warranty!

    Price From: USD 24.99

    Price From: USD 24.99

  • Fluval 06 Series External Canister Filters
    • Enhanced filtration - Reduced maintenance frequency - Quieter operation
    • Patented Aqua-Stop valves for easy hose disconnection
    • Re-engineered priming system for easier starting
    • Removable filter baskets include necessary media
    • Creates the cleanest, clearest, healthiest aquariums!

    Price From: USD 109.99

    Price From: USD 109.99

  • Two Little Fishies Phosban Reactors
    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.

    Price From: USD 52.73

    Price From: USD 52.73

  • Eheim Pro 4+ Canister Filters
    • 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

    Price From: USD 229.99

    Price From: USD 229.99

  • Aqueon QuietFlow LED Pro Aquarium Power Filter - 75
    • 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
    USD 47.99
    USD 47.99
  • Aqueon QuietFlow LED Pro Aquarium Power Filter - 30
    • 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
    USD 31.99
    USD 31.99
  • Aqueon QuietFlow LED Pro Aquarium Power Filters
    • 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

    Price From: USD 16.99

    Price From: USD 16.99

  • 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
  • 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
    • This patented design demonstrates near-silent operation & consistent flow rates
    • Auto-start pump requires no priming and automatically restarts if power was lost
    • Auto-start pump requires no priming and automatically restarts if power was lost
    USD 36.99
    USD 36.99
  • 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
    USD 16.99
    USD 16.99
  • Aqueon QuietFlow LED Pro Aquarium Power Filter - 20
    • 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
    USD 24.99
    USD 24.99
  • Two Little Fishies Phosban Reactor Replacement O-rings
    Replacement O-Rings for the Two Little Fishies Phosban Reactors

    Price From: USD 2.99

    Price From: USD 2.99

  • Two Little Fishies Phosban Reactor Replacement Foam Disks
    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.

    Price From: USD 3.99

    Price From: USD 3.99

  • 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 109.99
    USD 109.99
  • 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

    Out of stock

  • 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

    Out of stock

  • 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

    Out of stock

  • Trigger Systems ATO Reservoir - Crystal - 10 gal
    • Matches the color and design of the Crystal 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 145.99
    USD 145.99

    Out of stock

  • Trigger Systems ATO Reservoir - Crystal - 5 gal
    • Matches the color and design of the Crystal 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 99.99
    USD 99.99

    Out of stock

  • 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
    USD 399.99
    USD 399.99
  • Pro 4+ Canister Filter - 600
    • 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
    USD 299.99
    USD 299.99
  • 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
    USD 269.99
    USD 269.99
  • Pro 4+ Canister Filter - 250
    • 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
    USD 229.99
    USD 229.99
  • Macro External Canister Filter - 75 gal
    • External canister filter for aquatic habitats up to 75 gallons
    • Keeps water clear with 3 highly efficient stages of filtration
    • Provides a maximum flow rate of 200 gph - fully adjustable!
    • With all parts and media - no additional purchases required!
    • Designed for easy installation, operation, and maintenance
    USD 179.99
    USD 179.99
  • Macro External Canister Filter - 50 gal
    • External canister filter for aquatic habitats up to 50 gallons
    • Keeps water clear with 3 highly efficient stages of filtration
    • Provides a maximum flow rate of 200 gph - fully adjustable!
    • With all parts and media - no additional purchases required!
    • Designed for easy installation, operation, and maintenance
    USD 129.99
    USD 129.99
  • Nano External Canister Filter - 30 gal
    • External canister filter for aquatic habitats up to 30 gallons
    • Keeps water clear with 3 highly efficient stages of filtration
    • Provides a maximum flow rate of 160 gph - fully adjustable!
    • With all parts and media - no additional purchases required!
    • Designed for easy installation, operation, and maintenance
    USD 79.99
    USD 79.99
  • 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
    USD 149.99
    USD 149.99
  • 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 199.99

    Sale Price USD 169.99

    Regular Price: USD 199.99

    Sale Price 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)
    USD 499.99
    USD 499.99

    Out of stock

  • Seapora Breeder Sponge Filters
    Designed for use with an air pump or powerhead, the Seapora Breeder Sponge Filter provides both mechanical and biological filtration. It is simple to assemble and features a weighted base for stability.

    Price From: USD 7.99

    Price From: USD 7.99

  • API Filstar XP Canister Filters
    • 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

    Price From: USD 94.99

    Price From: USD 94.99

  • Fluval Underwater Filters
    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.

    Price From: USD 32.99

    Price From: USD 32.99

  • Hagen Power Filters (CSA)
    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.

    Price From: USD 25.99

    Price From: USD 25.99

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