Filters

Items 1 to 48 of 166 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.
  • 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
  • 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
  • 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

  • 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

  • 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

  • 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

  • Marineland Magnum Polishing Internal Canister 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
    USD 64.99
    USD 64.99
  • 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
  • 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

  • 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
  • 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 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
  • 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 159.99

    Regular Price: USD 169.99

    Sale Price USD 159.99

  • Eheim Pro 3 Thermofilter - 2180
    Eheim 2180 Thermofilter comes with a stainless steel heater built right into the bottom of the filter! This filter will ensure even heating and effective filtration of your aquarium water with no unsightly sumbersible heaters needed. Media not Included.

    Regular Price: USD 589.99

    Sale Price USD 469.99

    Regular Price: USD 589.99

    Sale Price USD 469.99

  • 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

  • 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

  • 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

  • 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
  • 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
  • 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

  • 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 298.88
    USD 298.88
  • 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

  • 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
  • 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 13.19
    USD 13.19
  • 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
  • Tetra Whisper Power Filter - 60
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 60 gal (330 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 37.99
    USD 37.99
  • 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 248.88
    USD 248.88
  • 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

  • Tetra Whisper Power Filter - 40
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 40 gal (210 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 26.99
    USD 26.99
  • 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 348.88
    USD 348.88
  • 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 67.49
    USD 67.49
  • 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

  • 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
    USD 12.49
    USD 12.49
  • 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

    Out of stock

  • Tetra Whisper Power Filter - 30
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 30 gal (145 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 22.99
    USD 22.99
  • 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
    USD 18.99
    USD 18.99
  • Tetra Whisper Power Filter - 20
    • Has 3-way Mechanical, Biological and Chemical filtration
    • Ideal for freshwater aquariums up to 20 gal (105 GPH)
    • Provides silent, long- lasting and reliable performance
    • High quality magnetic impeller is the only moving part!
    • Built-in flow control knob for slow rates during feeding
    USD 18.99
    USD 18.99
  • 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

    Regular Price: USD 97.99

    Sale Price USD 89.99

    Regular Price: USD 97.99

    Sale Price USD 89.99

  • 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 9.99
    USD 9.99
  • 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
    USD 6.99
    USD 6.99
  • 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!
    USD 89.99
    USD 89.99
  • 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 16.99
    USD 16.99
  • 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
    USD 12.99
    USD 12.99
  • 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

  • Lee's Triple Flow Corner Filter - Medium
    Filters Internal Filters. Lee's Corner Box Filter
    USD 0.00
    USD 0.00
  • 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 119.99

    Regular Price: USD 129.99

    Sale Price USD 119.99

  • 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!
    USD 56.49
    USD 56.49
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