Filters

Items 1 to 48 of 207 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.
  • Lee's Quick & Easy Corner Filter - Small
    • Mechanical filtration in smaller aquariums
    • Demonstrates maximum water circulation
    • It easily attaches to your airline and pump
    • The suction cup mounts assist with stability
    • Window for maintenance viewing purposes

    Regular Price: USD 8.99

    Sale Price USD 6.99

    Regular Price: USD 8.99

    Sale Price USD 6.99

  • 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 298.88
    USD 298.88
  • 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
  • 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 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
  • 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 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 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
  • Fluval FX High Performance Canister Filters
    • 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

    Price From: USD 279.99

    Price From: USD 279.99

  • 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

    Out of stock

  • 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
  • Lee's Triple-Flow Corner Filter - Large
    • Maximum efficiency for up to 100 gallon aquariums
    • This excellent model is made with three intake vents
    • Ideally used for beginners, breeder/ isolation tanks
    • Perfect solution for a fundamental or back-up filter
    • Use for biological, chemical or mechanical filtration

    Regular Price: USD 7.41

    Sale Price USD 5.48

    Regular Price: USD 7.41

    Sale Price USD 5.48

  • Lee's Triple-Flow Corner Filter - Small
    • Maximum efficiency for up to 45 gallon aquariums
    • This excellent model is made with three intake vents
    • Ideally used for beginners, breeder/ isolation tanks
    • Perfect solution for a fundamental or back-up filter
    • Use for biological, chemical or mechanical filtration

    Regular Price: USD 4.99

    Sale Price USD 3.49

    Regular Price: USD 4.99

    Sale Price USD 3.49

  • Lee's Under Gravel Filter - 20 L/29/26S 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 21.49
    USD 21.49
  • Aqueon QuietFlow E Internal Power Filter - 10 gal
    • Simple functionality for beginners and professionals
    • Easily attaches against the aquarium with suction cups
    • Use the hang-on feature, securing it with hang-on clips
    • Suitable with the Small Replacement Filter Cartridge
    • Provides chemical, biological & mechanical filtration
    USD 10.99
    USD 10.99
  • Aqueon QuietFlow E Internal Power Filter - 20 gal
    • Simple functionality for beginners and professionals
    • Easily attaches against the aquarium with suction cups
    • Use the hang-on feature, securing it with hang-on clips
    • Suitable with the Medium Replacement Filter Cartridge
    • Provides chemical, biological & mechanical filtration
    USD 17.99
    USD 17.99
  • Aqueon QuietFlow E Internal Power Filter - 3 gal
    • Simple functionality for beginners and professionals
    • Easily attaches against the aquarium with suction cups
    • Use the hang-on feature, securing it with hang-on clips
    • Suitable with the X-Small Replacement Filter Cartridge
    • This 3 gal model will only provide chemical filtration
    USD 8.99
    USD 8.99
  • Aqueon QuietFlow E Internal Power Filter - 40 gal
    • Simple functionality for beginners and professionals
    • Easily attaches against the aquarium with suction cups
    • Use the hang-on feature, securing it with hang-on clips
    • Suitable with the Large Replacement Filter Cartridge
    • Provides chemical, biological & mechanical filtration
    USD 22.99
    USD 22.99
  • Lee's Under Gravel Filter - 10 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

    Regular Price: USD 9.65

    Sale Price USD 7.68

    Regular Price: USD 9.65

    Sale Price USD 7.68

  • Lee's Under Gravel Filter - 30 Long
    • 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

    Regular Price: USD 16.99

    Sale Price USD 15.58

    Regular Price: USD 16.99

    Sale Price USD 15.58

  • Lee's Under Gravel Filter - 40/55 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

    Regular Price: USD 22.68

    Sale Price USD 20.88

    Regular Price: USD 22.68

    Sale Price USD 20.88

  • Pro Clear Aquatic Systems Frag Fuge Reef Sump - 26"
    • First reef sump to include coral frag section
    • Eurobrace includes notches for holding wires & dosing tubes
    • Probe holder holds up to 3 probes firmly with nylon screws
    • Auxilary backup drain for use with Herbie style overflow systems
    • Adjustable flow-gate to customize flow through frag section
    USD 369.99
    USD 369.99
  • Seapora Nano Power Filter
    • Creates a clean & clear aquatic environment
    • Sponge media blocks are efficient & reusable
    • Maintenance is simple with just a quick rinse
    • Created with a durable hang-on filter design
    • For up to 7.5 gal tanks & desktop aquariums

    Regular Price: USD 10.99

    Sale Price USD 7.99

    Regular Price: USD 10.99

    Sale Price USD 7.99

  • Xaqua InOut Complete Overflow System
    • Complete easy-to-install drainage and return system
    • Mounted externally with no impact on tank volume
    • Rates for a maximum pump capacity of 660 gallons per hour
    • Hydrodynamic Pulsing feature reduces noise and creates waves
    • No moving parts and no additional fittings required
    USD 99.11
    USD 99.11
  • 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

    Out of stock

  • Lee's Sponge Filters
    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.

    Price From: USD 5.99

    Price From: USD 5.99

  • Lee's Undergravel Fish Bowl Filters
    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.

    Price From: USD 3.28

    Price From: USD 3.28

  • Seachem Tidal Power Filters
    • 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

    Price From: USD 54.00

    Price From: USD 54.00

  • Lee's Under Gravel Filters
    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.

    Price From: USD 7.68

    Price From: USD 7.68

  • Lee's Premium Under Gravel Filter - 75/90 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 56.49

    Sale Price USD 43.58

    Regular Price: USD 56.49

    Sale Price USD 43.58

  • 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
    USD 185.99
    USD 185.99
  • Seapora Nano Power Filter
    • Power filter with a hang-on-tank design
    • Thorough multi-stage filtration system
    • Packaged with a reusable Bio-Sponge
    • Disposable Carbon Cartridge included
    • Simple to maintain and easy to restock

    Price From: USD 7.99

    Price From: USD 7.99

  • Seapora AM Canister+ Filters
    Big things come in small packages with Seapora's AM Canister+ Filter! Compact and versatile, the AM Canister+ Filter utilizes multi-stage filtration and features an integrated surface skimmer.

    Price From: USD 99.99

    Price From: USD 99.99

  • Cobalt Aquatics Clearvue Mini Internal Filters
    Description Coming Soon!

    Price From: USD 27.98

    Price From: USD 27.98

  • Aqueon QuietFlow Canister Filters
    Aqueon QuietFlow Canister Filters are simple, efficient and powerful canister filters for saltwater and freshwater aquariums with easy to replace carbon cartridges.

    Price From: USD 86.99

    Price From: USD 86.99

  • Cobalt Aquatics Clearvue Mini Internal Filter - 20
    Description Coming Soon!
    USD 27.98
    USD 27.98
  • Cobalt Aquatics Clearvue Mini Internal Filter - 30
    Description Coming Soon!
    USD 34.15
    USD 34.15
  • Cobalt Aquatics Clearvue Mini Internal Filter - 45
    Description Coming Soon!
    USD 40.33
    USD 40.33
  • Trigger Systems Sapphire Sump - 26"
    • 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 324.99
    USD 324.99
  • Eheim aquaCorner 60 Corner Internal Filter
    Description Coming Soon!

    Regular Price: USD 41.49

    Sale Price USD 29.99

    Regular Price: USD 41.49

    Sale Price USD 29.99

  • 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 213.99

    Sale Price USD 189.99

    Regular Price: USD 213.99

    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 106.99

    Sale Price USD 94.99

    Regular Price: USD 106.99

    Sale Price USD 94.99

  • 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 150.49

    Sale Price USD 129.99

    Regular Price: USD 150.49

    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 94.99

    Regular Price: USD 109.99

    Sale Price USD 94.99

  • 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 129.99

    Regular Price: USD 149.99

    Sale Price USD 129.99

  • Seapora Nitrate Reactors
    The Seapora Nitrate Reactor by JNS is an excellent tool for dramatically reducing nitrate levels in aquarium ecosystems through the use of beneficial bacteria in Bioballs.

    Price From: USD 139.99

    Price From: USD 139.99

  • 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

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