Filters

Items 49 to 96 of 196 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.
  • Wavereef Algae Reactor with LED Lighting
    • A unique and safe method of natural filtration
    • Removes algae-producing nutrients from water
    • Inner LEDs provide safe high quality lighting
    • Stabilizes pH and and lowers dissolved CO2 levels
    • Low wattage and safe operation with heat sink

    Regular Price: USD 189.99

    Sale Price USD 149.99

    Regular Price: USD 189.99

    Sale Price USD 149.99

  • Pro Clear Aquatic Systems Freedom Flex - 300

    Regular Price: USD 399.99

    Sale Price USD 349.99

    Regular Price: USD 399.99

    Sale Price USD 349.99

  • Pro Clear Aquatic Systems Freedom Flex - 400

    Regular Price: USD 449.99

    Sale Price USD 399.99

    Regular Price: USD 449.99

    Sale Price USD 399.99

  • Trigger Systems Sapphire Sumps
    Sapphire Series sumps combine function, efficiency, and style into high quality filtration systems that are hand-crafted in the U.S.A. With interchangeable plates, self-adjusting foam block platform, splash lid, sappire coloring to block light, and more!

    Price From: USD 324.99

    Price From: USD 324.99

    Out of stock

  • Pro Clear Aquatic Systems Freedom Flex Sumps
    Description Coming Soon!

    Price From: USD 299.99

    Price From: USD 299.99

  • Trigger Systems Sapphire Sump - 39"
    • 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
    • Contains 100 micron filter sock to provide effective fine filtration
    • Sapphire coloring blocks light to prevent unwanted algae growth
    USD 524.99
    USD 524.99

    Out of stock

  • Pro Clear Aquatic Systems Freedom Flex - 200
    Description Coming Soon!

    Regular Price: USD 369.99

    Sale Price USD 299.99

    Regular Price: USD 369.99

    Sale Price USD 299.99

    Out of stock

  • Seapora AM Canister+ Filter 120 - 396 gph
    • Compact and versatile canister filter
    • Utilizes thorough multi-stage filtration
    • Includes an integrated surface skimmer
    • Features an auto-priming start switch
    • Packaged with shut-off valves and filter media
    USD 159.99
    USD 159.99
  • Seapora AM Canister+ Filter 60 - 264 gph
    • Compact and versatile canister filter
    • Utilizes thorough multi-stage filtration
    • Includes an integrated surface skimmer
    • Features an auto-priming start switch
    • Packaged with shut-off valves and filter media
    USD 119.99
    USD 119.99
  • Seapora Nitrate Reactor - Large
    • Helps reduce nitrate levels in aquariums
    • Utilizes Bioballs to strip nitrates out
    • Includes a powerful Sicce Syncra silent pump
    • Simple to clean, with an easy unlock top
    • Sturdy build is designed to last a lifetime

    Regular Price: USD 219.99

    Sale Price USD 189.99

    Regular Price: USD 219.99

    Sale Price USD 189.99

  • Seapora Biopellet Reactor Alpha-1
    • Provides powerful supplementary filtration
    • Specifically designed for biopellet media
    • Includes a powerful Sicce Syncra water pump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 109.99

    Sale Price USD 89.99

    Regular Price: USD 109.99

    Sale Price USD 89.99

  • Lee's Triple Flow Corner Filter - Medium
    Filters Internal Filters. Lee's Corner Box Filter

    Regular Price: USD 6.99

    Sale Price USD 4.99

    Regular Price: USD 6.99

    Sale Price USD 4.99

  • Lee's Triple-Flow Corner Filters
    Triple-Flow Corner Filters may be used for biological, chemical or mechanical filtration, with three intake vents. It features maximum efficiency for ideally breeder or isolation tanks, or used as a fundamental or back-up filter.

    Price From: USD 3.49

    Price From: USD 3.49

  • Pro Clear Aquatic Systems Freedom 4-in-1 Sumps
    • 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

    Price From: USD 298.88

    Price From: USD 298.88

  • Pro Clear Aquatic Systems Freedom Reef Sumps
    • 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

    Price From: USD 198.88

    Price From: USD 198.88

  • Aqueon QuietFlow E Internal Power Filters
    • Suitable with the X-Small Replacement Filter Cartridge
    • This 3G model will only provide chemichal filtration

    Price From: USD 10.49

    Price From: USD 10.49

  • Lee's Premium Under Gravel Filters
    Premium Under Gravel Filters clean your fresh or saltwater aquarium through a biological filtering process which supports the growth of beneficial bacteria, allowing natural detoxification while maintaining proper ammonia balance.

    Price From: USD 15.99

    Price From: USD 15.99

  • Lee's Discard-a-Filter - 2 pk
    • Consists of carbon, zeolite and sponge filtration
    • Suitable for small aquariums or Kritter Keepers
    • This will keep water clean, clear and odor-free
    • Discard after use; approximately every month
    • Includes suction cup mounts for simple set-up

    Regular Price: USD 9.99

    Sale Price USD 6.49

    Regular Price: USD 9.99

    Sale Price USD 6.49

    Out of stock

  • Lee's Premium Under Gravel Filter - 10 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 19.99

    Sale Price USD 15.99

    Regular Price: USD 19.99

    Sale Price USD 15.99

    Out of stock

  • Lee's Premium Under Gravel Filter - 125/135 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 89.99

    Sale Price USD 69.99

    Regular Price: USD 89.99

    Sale Price USD 69.99

    Out of stock

  • Lee's Premium Under Gravel Filter - 15/20 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 26.99

    Sale Price USD 17.49

    Regular Price: USD 26.99

    Sale Price USD 17.49

  • Lee's Premium Under Gravel Filter - 20 L/29 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 29.99

    Sale Price USD 19.99

    Regular Price: USD 29.99

    Sale Price USD 19.99

  • Lee's Premium Under Gravel Filter - 30/45 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 36.99

    Sale Price USD 24.99

    Regular Price: USD 36.99

    Sale Price USD 24.99

  • Lee's Round Under Gravel Bowl Filter - Large
    Bowl Filter allows you to maintain fish safely in a bowl or small designer aquarium for extended periods of time. Includes plant and carbon cartridge. Minimizes maintenance responsibility.

    Regular Price: USD 6.99

    Sale Price USD 3.99

    Regular Price: USD 6.99

    Sale Price USD 3.99

    Out of stock

  • Lee's Dual Action Foam Filter - Triangle - Up to 25 gal
    Composed of open-celled foam which provides enormous amounts of usable surface area for beneficial bacteria to colonize. Excellent for breeding all types of aquarium fish, as well as for hatching and raising brine shrimp.

    Regular Price: USD 13.99

    Sale Price USD 6.99

    Regular Price: USD 13.99

    Sale Price USD 6.99

    Out of stock

  • Lee's Dual Action Foam Filter - Round - Up to 5 gal
    Composed of open-celled foam which provides enormous amounts of usable surface area for beneficial bacteria to colonize. Excellent for breeding all types of aquarium fish, as well as for hatching and raising brine shrimp.

    Regular Price: USD 9.99

    Sale Price USD 5.99

    Regular Price: USD 9.99

    Sale Price USD 5.99

  • Seapora Biopellet Reactor Alpha-2
    • Provides powerful supplementary filtration
    • Specifically designed for biopellet media
    • Includes a powerful Sicce Syncra water pump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 159.99

    Sale Price USD 129.99

    Regular Price: USD 159.99

    Sale Price USD 129.99

  • Seapora Media Reactor - Standard
    • Provides powerful supplementary filtration
    • Utilizes the media of your personal choice
    • Includes a powerful Sicce Syncra water pump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 109.99

    Sale Price USD 89.99

    Regular Price: USD 109.99

    Sale Price USD 89.99

  • Seapora Media Reactor - Large
    • Provides powerful supplementary filtration
    • Utilizes the media of your personal choice
    • Includes a powerful Sicce Syncra water pump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 149.99

    Sale Price USD 124.99

    Regular Price: USD 149.99

    Sale Price USD 124.99

  • Seapora Media Reactor E Series - Standard
    • Provides powerful supplementary filtration
    • Utilizes the media of your personal choice
    • Versatile build functions in line or in sump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 71.99

    Sale Price USD 59.99

    Regular Price: USD 71.99

    Sale Price USD 59.99

  • Seapora Media Reactor E Series - Large
    • Provides powerful supplementary filtration
    • Utilizes the media of your personal choice
    • Versatile build functions in line or in sump
    • Simple to clean, with an easy unlock top
    • Built to last forever, with a sturdy make

    Regular Price: USD 89.99

    Sale Price USD 69.99

    Regular Price: USD 89.99

    Sale Price USD 69.99

  • Seapora Nitrate Reactor - Standard
    • Helps reduce nitrate levels in aquariums
    • Utilizes Bioballs to strip nitrates out
    • Includes a powerful Sicce Syncra silent pump
    • Simple to clean, with an easy unlock top
    • Sturdy build is designed to last a lifetime

    Regular Price: USD 159.99

    Sale Price USD 139.99

    Regular Price: USD 159.99

    Sale Price USD 139.99

    Out of stock

  • Coralife Marine Filter with Protein Skimmer - 30 gal
    Description Coming Soon!

    Regular Price: USD 49.99

    Sale Price USD 36.99

    Regular Price: USD 49.99

    Sale Price USD 36.99

  • Aqueon QuietFlow Canister Filter - 200
    • Designed for use with both freshwater and saltwater tanks
    • Preloaded with biological, chemical, and mechanical media
    • Includes a convenient back-hanging water polishing unit
    • Easy to replace carbon cartridges save you time and trouble
    • Can be modified for a more traditional water return method
    USD 104.99
    USD 104.99
  • Aqueon QuietFlow Canister Filter - 300
    • Designed for use with both freshwater and saltwater tanks
    • Preloaded with biological, chemical, and mechanical media
    • Includes a convenient back-hanging water polishing unit
    • Easy to replace carbon cartridges save you time and trouble
    • Can be modified for a more traditional water return method
    USD 139.99
    USD 139.99
  • Aqueon QuietFlow Canister Filter - 400
    • Designed for use with both freshwater and saltwater tanks
    • Preloaded with biological, chemical, and mechanical media
    • Includes a convenient back-hanging water polishing unit
    • Easy to replace carbon cartridges save you time and trouble
    • Can be modified for a more traditional water return method
    USD 169.99
    USD 169.99
  • Lee's Carbon Cartridges for Under Gravel Bowl Filters - 2 pk
    Lee's

    Regular Price: USD 3.99

    Sale Price USD 1.99

    Regular Price: USD 3.99

    Sale Price USD 1.99

    Out of stock

  • Lee's Discard-a-Filter
    Lee's Discard A Filter is a disposable easy to use filter, that is ideal for keeping the water in smaller aquariums crystal clear. Zeolite, activated carbon, and a sponge provides chemical and mechanical filtration using air from your air pump.

    Regular Price: USD 5.99

    Sale Price USD 3.49

    Regular Price: USD 5.99

    Sale Price USD 3.49

  • Lee's Dual Action Foam Filter - Clover - Up to 40 gal
    Composed of open-celled foam which provides enormous amounts of usable surface area for beneficial bacteria to colonize. Excellent for breeding all types of aquarium fish, as well as for hatching and raising brine shrimp.

    Regular Price: USD 16.99

    Sale Price USD 10.98

    Regular Price: USD 16.99

    Sale Price USD 10.98

  • Lee's Premium Under Gravel Filter - 40/55 gal
    • It circulates water flow through the gravel bed
    • Incorporates two Premium Carbon Cartridges
    • Includes Discard-a-Stone & a fish-saver elbow
    • The telescoping ring adjusts uplift tube height
    • Maximize water quality by using a power filter!

    Regular Price: USD 43.99

    Sale Price USD 29.99

    Regular Price: USD 43.99

    Sale Price USD 29.99

  • Nano External Canister Filter - 10 gal
    • 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

    Regular Price: USD 44.99

    Sale Price USD 34.99

    Regular Price: USD 44.99

    Sale Price USD 34.99

  • 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

    Out of stock

  • 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

  • QuietFlow Internal Filter - AT40
    • Delivers highly effective 3-stage filtration
    • Ideal for aquariums and terrariums up to 40 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!

    Regular Price: USD 39.99

    Sale Price USD 32.99

    Regular Price: USD 39.99

    Sale Price USD 32.99

  • QuietFlow Internal Filter - AT30
    • Delivers highly effective 3-stage filtration
    • Ideal for aquariums and terrariums up to 30 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!

    Regular Price: USD 39.99

    Sale Price USD 32.99

    Regular Price: USD 39.99

    Sale Price USD 32.99

  • QuietFlow Internal Filter - AT15
    • Delivers highly effective 3-stage filtration
    • Ideal for aquariums and terrariums up to 15 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!

    Regular Price: USD 27.99

    Sale Price USD 22.99

    Regular Price: USD 27.99

    Sale Price USD 22.99

  • QuietFlow Internal Filter - AT10
    • 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!

    Regular Price: USD 24.99

    Sale Price USD 19.99

    Regular Price: USD 24.99

    Sale Price USD 19.99

  • External Canister Filter - 406
    • 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!
    USD 199.99
    USD 199.99

    Out of stock

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