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The Best Aquarium Filters: Mechanical, Biological & Chemical Filtration

Of all the many aquarium supplies, aquarium filters are the most vital piece of equipment. Filters keep the fish tank’s water clean, clear, and healthy. Here’s everything you need to know about choosing the right filter for your aquarium.

Best Aquarium Filters Reviews

These are the best aquarium filters:

OASE Indoor Aquatics BioMaster Thermo

The OASE Indoor Aquatics BioMaster Thermo has a sleek and attractive design. Not only is it an excellent filter for your fish tank, but it also has a built-in heater.

It has a prefilter module that you spin out of the canister to rinse and reuse again. It also comes with intake and outlet, suction cups, a spray bar, activated carbon pads, and bio media. It uses a 4 stage filtration mechanism ( biological, mechanical, chemical, and prefiltration) to keep the water safe for fish.

OASE Indoor Aquatics Biomaster Thermo 350
  • The Bio master thermos 350 has an integrated heater in compact filter design
  • The built-in heater provides your aquarium with Precise and uniform temperature levels while the product integration delivers unobstructed views of your Aquarium
  • External filter operates quietly to circulate and filter your aquarium water
  • Includes 4-stage filtration: biological, mechanical, chemical, and prefiltration
  • Hel-x, suspended filter media, creates the optimal surface area for beneficial bacteria growth

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Very quiet
  • Easy to prime
  • Separate, removable prefilter unit
  • Integrated, removable heater
  • Large media trays
  • Sturdy handle
  • Long input/output hose
  • 360° rotatable hose connection nozzles
  • Flow controllable hose adapters
  • Mounting components for using the heater external to the filter
  • Durable

Cons

  • Potential points for seal failure
  • User manual errors
  • Confusing component names
  • Small amount of plastic bio media included

Marineland Magniflow Canister Filter for Aquariums

This Marineland aquarium canister filter has bio-filter balls and ceramic rings that produce to support good bacteria growth. The black diamond carbon gets rid of odors and other impurities in the water, while the filter foam pads catch dirt and debris.

MarineLand Magniflow Canister Filter for Aquariums
  • Canister lids ensures water tight seal
  • The polishing filter pad acts as a water polisher removing fine debris
  • The bio-filter balls and ceramic rings provide a large, multifaceted surface area for the growth of bio spires
  • Black Diamond Carbon Removes odors, discoloration and water impurities
  • Filter Foam pads screen out dirt and debris.Fills filter chamber with water for self-priming system startup

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Suitable for aquariums up to 100-gallons
  • A fast and powerful filtration system
  • Quick auto prime feature
  • Easy to install
  • Durable
  • Comes with media filters

Cons

  • Potential leakage issues
  • Bulky

Fluvial C Power Aquarium Canister Filter

The Fluval C Power Filter is a 5-stage filtration system for aquariums between 40-70 gallons. It filters up to 264 gallons of water per hour. There’s a cleaning indicator that lets you know when its time to clean the polyfoam. It utilizes a clip-on filter for easy and quick maintenance.

Sale
Fluval C4 Power Filter
  • Power filter featuring 5 stages of filtration for aquariums between 40 to 70 gallons
  • Filters 264 gallons per hour
  • Equipped with cleaning indicator for when the polyfoam needs to be rinsed
  • Clip on filter; Quick and easy maintenance
  • Helps provide a stress-free environment; Works to maintain refreshing crisp water

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Available in many sizes
  • High hourly filtration capabilities
  • 5-stage filtration
  • Easy to mount and set up

Cons

  • Gets loud after prolonged use
  • Some parts not durable
  • Needs space behind the tank to set up

Sunsun Pro Canister Filter

The Sunsun Pro is a 4-stage canister filter that has three filter baskets to capture debris. It uses fine and coarse filter pads as well as activated carbon in a pouch.

Sunsun Hw304B 525GPH Pro Canister Filter Kit with 9-watt UV Sterilizer
  • HW-304B Pro Filtration Kit, Good for up to 150 gallon aquariums
  • Flow rate: 525 GPH (2000L/Hr)
  • Dimension: 11" L X 11" W X 17" H
  • Pro Kit Includes Canister Filter w/9 Watt UV, 4 White Filter Pads, 1 Blue Coarse Pad, 4 Media Baskets
  • Includes 1lb of Premium Filter Carbon, 1lb of Ceramic Rings and 1 Set of Bio Balls

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Easy to setup
  • Built-in a UV sterilizer
  • Quiet
  • Filters up to 535 gallons per hour

Cons

  • Filter motors not durable

API Filstar XP

The API Filstar canister filter has many high-quality plastic components. It allows them to last longer than other filters made of inferior plastic. The filter has a Bio-Chem Zorb, an activated carbon + high-performance adsorption resin. Bio-Chem Stars; a porous plastic biological filter.

API FILSTAR XP FILTER SIZE S Aquarium Canister Filter 1-Count Box
  • Contains one (1) API FILSTAR XP FILTER SIZE S Aquarium Canister Filter 1-Count Box
  • Provides powerful filtration for perfectly balanced and crystal clear aquarium water.
  • Very easy to use and maintain; allows for centralized control of all the functions of the filtration system.
  • Quick disconnect, leak free, fast cleaning, and self-priming.
  • Allows the use of various filtration media available in the API range, and meets your specific freshwater and saltwater requirements.

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Durable
  • Easy to prime
  • Quiet operation
  • Easy to clean and maintain
  • Large media trays with media included
  • Great value for the price

Cons

  • Stiff tubbing can be difficult to place into the disconnect valve
  • Multiple pieces that you have to connect
  • Not enough media included (additional purchase necessary)

EHEIM Classic External Canister Filter

The Eheim Classic is a simple aquarium canister filter with essential functions. There’s no media basket, and the filtration material is inside the canister. There’s also a spray bar, inlet pipe, hose, and other installation accessories, filter media (EHEIM Mech & Substrat Pro), and valves.

EHEIM Classic Canister Filter 2213, Classic 250 - PetOverstock
  • Permo-elastic silicon sealing ring fixed on the pump head for easy and safe closing after cleaning
  • Equipped with filter sponges and/or loose filter media
  • Accessories included: spray bar, inlet pipe, hose and installation accessories
  • Comes complete with filter media (EHEIM Mech & Substrat Pro) and valves
  • Permo-elastic silicon sealing ring fixed on the pump head for easy and safe closing after cleaning

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Silent operation
  • Easy to install
  • Effective water filtration system
  • Low energy consumption

Cons

  • Replacement parts hard to find
  • Impeller is prone to breakage

Hydor Professional External Canister Filter

The Hydor professional filter has a biological, mechanical, and chemical filtration system. So, the water in your aquarium is always fresh and clear. Other additions are media baskets with mechanical filter pads and a biological filtration media.

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Easy to set ups
  • Safety lock system
  • Easy to use and clean
  • Powerful flow rate
  • Easy priming system

Cons

  • Potential leakage issues when disconnecting valves

References

Aqueon QuietFlow HOB Filter (Power Filter)

The Aqueon QuietFlow hang-on-back filter has four filtration stages (mechanical, biological, chemical, and a specialty filter pad). It has a lifetime warranty, easy to set up, and alerts you when the filter is ready for a change. It’s very quiet yet effective. But, if you keep small fish, you need a pre-filter sponge.

Aqueon QuietFlow LED PRO 75 Aquarium Power Filter
  • Certified flow rates that assure proper water circulation for improved fish health
  • High flow rates for optimal dissolved oxygen content to promote healthier, more active fish
  • Provides mechanical, chemical, biological and optional, additional specialty pad filtration
  • Self-priming filter pump will auto-start initially or restart if power is interrupted and restored
  • Internal pump design helps dampen noise and eliminate leaks with self-priming feature

Last update on 2020-09-22 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Easy to set up
  • Self-priming feature
  • LED light to tell when filter pad needs changing.
  • Quiet

Cons

  • Pre-filter sponge needed for the intake tube if you have small fish.
  • Small filter so it has less space for media.
  • Larger models are slightly louder than the smaller ones.

Penn Plax Cascade Hang-on Aquarium Filter

The Penn Plax Cascade filter has different sizes for fish tanks between 5 to 100 gallons. It offers three stages of filtration: biological, chemical, and mechanical. It is easy to set up, affordable and has a 3-year warranty.

Sale
Penn-Plax Cascade Hang-on Aquarium Filter with Quad Filtration System Cleans Up to 100 Gallon Tank (CPF5)
  • Hang on aquarium filter quietly delivers 300 gallons per hour of crystal clear water for your fresh or marine aquariums from 55 to 100 gallons in size.
  • Revolutionary Bio-Falls Quad-Filtration system provides efficient filtration with anaerobic bacteria for additional ammonia and nitrite removal providing maximum oxygenation.
  • Internal sponge optimizes colonization of beneficial anaerobic bacteria and polyfiber floss cartridge traps floating particulate matter.
  • Adjustable flow knob allows you to reduce filtration during feeding times or as needed. Aquarium filter is recommended for both freshwater and saltwater applications.
  • Activated carbon cartridge removes harmful chemicals, toxins, odors, discoloration, and other contaminants for your aquarium.

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pro

  • It has a large tank, which provides more extended use before you need to replace the filter.
  • The materials used to build the filter are durable.
  • It’s easy to set up.
  • It comes with bio-sponges, bio-floss, activated carbon, etc.

Cons

  • The filter makes noticeable noise when running.

Marineland Power Filter

The Marineland power filter is easy to set up, cheap and has options for a variety of tank sizes up to 70-gallons. But, it can be a bit louder than other filters on the list. It has all three stages of filtration.

MarineLand Penguin 100 Power Filter, 10-20 Gallon, 100 GPH (PF0100B),Black
  • WITH ROTATING BIO-WHEEL: Patented Bio-Wheel technology provides excellent wet/dry biological filtration.
  • MULTI-STAGE FILTRATION: Delivers mechanical, chemical and biological aquarium filtration to maintain a clean aquatic environment.
  • COMPATIBILITY: Use with Marineland Rite-Size Filter Cartridges (see individual filter for sizing recommendations).
  • FIVE SIZES: Available in 75 GPH, 100 GPH, 150 GPH, 200 GPH and 350 GPH sizes.
  • Age Range Description: all ranges

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Pros

  • Quiet
  • The filter is easy to prime
  • Affordable

Cons

  • Not as durable as other options on the list.

Fluval HOB Filter

There are three variations of this hang-on-back aquarium filter:

  • The C2 is great for tanks between 10 gallons and 30 gallons. The flow rate is 119 gallons per hour.
  • The C3 works best with fish tanks between 20 and 50 gallons and has a flow rate of 153 gallons per hour.
  • The C4 is best for tanks that are 40 to 70 gallons and it has a flow rate of 264 gallons per hour.

Simple Aquarium Sponge Filter

Here’s a simple sponge filter that provides basic mechanical filtration and biological filtration.

uxcell 4 1/2 Inch Aquarium Fish Tank Biochemical Sponge Filter
  • Biochemical Sponge Filter provides both mechanical and biological filtration.
  • Filter Dimension: ~5 1/2(L) x 4 1/2(D)inch #
  • Tube Dimension: ~2 3/4(L) x 13/16(D)inch
  • Biochemical Sponge Filter provides both mechanical and biological filtration.
  • Simply install an airline into the unit and provide both and filtration for your fish.

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Lee’s Premium Undergravel Filter

Here’s a good under gravel filter that overs all three stages of filtration.

Lee's 50/65 Premium Undergravel Filter, 18-Inch by 36-Inch
  • Country Of Origin: United States
  • Item Package Height: 16.5
  • Item Package Length: 17.625
  • Item Package Width: 3.125

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

What Are Aquarium Filters?

Aquarium filters are one of the most critical components of both freshwater and marine fish tanks. Aquarium filters remove physical and soluble chemical waste from aquariums, thus making maintenance more manageable, providing a healthier ecosystem for plants and aquatic animals.

Why You Need An Aquarium Filter?

You need a filter in your aquarium to keep the water in your fish tank clean. Filtration removes debris and toxic chemicals like ammonia and nitrite.

Filters can also help oxygenate the water through surface agitation. You should use an aquarium filter to reduce the risk of disease in fish and plants and to help maintain a clean and healthy environment.

Types of Aquarium Filtration

There are different methods of filtration: mechanical filtration, biological filtration and chemical filtration. Some filters use all three or a combination of two. Others only offer one kind of filtration.

Summary:

  1. Mechanical filtration: water passes through a solid barrier to remove solids.
  2. Biological filtration: nitrifying bacteria build-up to convert toxic compounds like ammonia and nitrites into the less harmful nitrates (remove with partial water changes).
  3. Chemical filtration: uses media such as activated carbon to get rid of impurities.

Mechanical Filtration

Mechanical filtration removes uneaten food and other debris from the water. As water from the aquarium passes through the filter, it removes debris like uneaten food. Most mechanical filters include filter cartridges, sponges, and fibrous pads. Mechanical filtration occurs first in a fish tank filter that offers 3-stage filtration.

Biological Filtration

Biological filtration gets rid of ammonia, which is toxic to fish. It’s crucial that are fish tanks have some form of biological filtration. The way it works is that colonies of nitrifying bacteria grow on the biological filter and then, in turn, converts Ammonia into Nitrite, and then Nitrite into Nitrate as filtered water passes through. To prevent nitrate build-up, perform weekly partial water changes. Biological filtration occurs after mechanical filtration.

Chemical Filtration

Chemical filtration helps to remove heavy metals and other impurities. Most use activated carbon and filtering resins to adsorb/absorb impurities. For example, one can use chemical filtration to remove a build-up of fish medicine.

References

Types Of Aquarium Filters

The main types of aquarium filters are:

  • External Canister Filters
  • Hang on back (HOB) Power Filters
  • Sponge Filters
  • Under-gravel Filters

External Canister Filters

Canister filters are external filters with two tubes that connect the filter to the tank. An intake tube removes dirty water from the tank and brings it to the filter. The water then goes through the filtration process before going back into the tank through the second tube. One can set up a canister filter to provide all three stages of filtration; mechanical, biological, and chemical.

Best External Canister Filters

Bestseller No. 1
Penn Plax Cascade CCF3UL Canister Filter For Large Aquariums and Fish Tanks – Up To 100 Gallons, Filters 265 GPH,Blue
  • CASCADE CANISTER FILTER FOR FRESHWATER OR MARINE ENVIRONMENTS: the Cascade 1000 (CCF3UL) has 3 media baskets, works at 265 GPH, and is recommended for Aquariums up to 100 gallons. It measures 11.5 x 17 x 10 inches.
  • STATE OF THE ART FEATURES OF THE CASCADE 1000: ♦ flow valves that rotate 360 degrees for easy maneuvering in even the tightest aquarium cabinets ♦ large capacity media baskets allow aquarists to customize to their media needs ♦ push button primer allows for a quick and easy prime of the filter ♦ includes a spray bar, tubing, directional spout for customization, and filter medium.
  • USE ANY COMBINATION OF MEDIA: floss pad for removing particulate matter and a course sponge that provides abundant surface for promoting bacterial growth (to remove ammonia and nitrites) included free with purchase
  • SEE BELOW FOR DIAGRAM, THE CASCADE 1000 INCLUDES: ♦ Flow rate control cut-off valves ♦ two independent directional 360 degree rotating valve taps ♦ swimming pool – style hose clamps ♦ quick, easy, push button self-primer ♦ extra-large capacity stackable filter medium containers with lift-up handles ♦ floss pad and coarse sponge included, free with each canister filter ♦ easy lift alignment clamps that release vacuum suction ♦ sturdy tip-proof base
  • FILTER MEDIA OPTIONS BY CASCADE AVAILABLE ON AMAZON, SOLD SEPARATELY: see below for details, sold separately is media such as: bio-floss, bio-sponge, bio-rings, filt-a-pack pro-z, and filt-a-pack pro-carb-z.
Bestseller No. 2
Polar Aurora 4-Stage External Canister Filter 525GPH with 9-watt Light New(525GPH)
  • Good for up to 200 gallon fish tanks.Maximum flow rate of 525GPH from built in pump
  • 4 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter
  • Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance
  • Built in 9 Watt Light for controlling algae spores/bacteria and promoting clear water
  • The four flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration.
Bestseller No. 3
Zoo Med Turtle Clean 15 External Canister Filter
  • Easy to clean
  • Small and convenient
  • Good to 15 gallons
  • Small, convenient filter fits outside the tank
  • Contains biological, chemical, and mechanical filtration

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Hang on back (HOB) Power Filters

A hang on back (HOB) filter is a type of filter that hangs on the back of the tank. So, it’s an external filter, but not it is not as big as canister filters. Their size makes them suitable for a wider variety of aquariums, and they can use all three types of filtration.

A water intake tube takes water from the tank to the filter. Filtration occurs inside the filter. The filtered water then returns to the tank through tubes that create a waterfall-like flow.

Best HOB Power Filters

SaleBestseller No. 1
Penn-Plax Cascade Hang-on Aquarium Filter with Quad Filtration System Cleans Up to 100 Gallon Tank (CPF5)
  • Hang on aquarium filter quietly delivers 300 gallons per hour of crystal clear water for your fresh or marine aquariums from 55 to 100 gallons in size.
  • Revolutionary Bio-Falls Quad-Filtration system provides efficient filtration with anaerobic bacteria for additional ammonia and nitrite removal providing maximum oxygenation.
  • Internal sponge optimizes colonization of beneficial anaerobic bacteria and polyfiber floss cartridge traps floating particulate matter.
  • Adjustable flow knob allows you to reduce filtration during feeding times or as needed. Aquarium filter is recommended for both freshwater and saltwater applications.
  • Activated carbon cartridge removes harmful chemicals, toxins, odors, discoloration, and other contaminants for your aquarium.
SaleBestseller No. 2
FORZA Hang-on Back Power Filters, 5 - 15
  • Tank capacity: 15-gallon
  • Flow rate: 45 GPH
  • Power: 2-watt
  • Volt/freq: 110-120volt/60hertz
  • For best results, replace filter cartridges monthly

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Sponge Filters

Sponge filters are simple and easy to set up. These filters submerge in the water and water passes through the sponge via an air stone or water pump. Most beginner aquarium kits have sponge filters. But, you usually need a more powerful filtration system to work best for most tanks.

Best Sponge Filters

Bestseller No. 1
Aquapapa Bio Sponge Filter for Betta Fry Aquarium Fish Tank Up to 55 Gal, 3-Pack (L)
  • Provide both mechanical and biological filtration.
  • Simply install an airline into the unit and provide both aeration and filtration for your fish. Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle.
  • The sponge traps larger waste particles mechanically cleaning the water without trapping baby fish.
  • Product dimensions: 4.5”D x 8.0”H. They are useful for as breeding filter or as secondary filter. Or they can be used as pre-filtration unit by fitting to an external or a top filter.
  • Package includes: 3 pcs of Sponge filters
Bestseller No. 2
AQUANEAT Aquarium Bio Sponge Filter up to 60 Gal Breeding Fry Betta Shrimp Fish Tank
  • Sponge filter provide both mechanical and biological filtration, also, the air infusion chamber produces minute bubbles which increase the oxygen solubility
  • EASY TO SET UP & CLEAN: Simply install an airline into the unit and turn on the air pump, simply rinse and squeeze sponge in tank water
  • RECOMMEND TANK SIZE: Up to 60 gallon, excellent for small size fish like dwarf cichlid, guppy, killifish etc., or for hatcheries, maternity tanks, and fry tanks, as the filter produces minimal current and has almost no way to suck the fish through the filter
  • DIMENSION: 4.5"D X 8.0"H
  • INCLUDES: 1 PC of sponge filter
Bestseller No. 3
BACTO-SURGE HIGH DENSITY FOAM FILTER (2-Pack)
  • BACTO-SURGE HIGH DENSITY FOAM FILTER

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Under-gravel Filters

Undergravel filters are very effective, but regular cleaning is a must. They are not best for planted aquariums as they slow down the plants’ growth.

Best Under Gravel Fish Tank Filters

SaleBestseller No. 1
Penn Plax Premium Under Gravel Filter System - for 40-55 Gallon Fish Tanks & Aquariums, Blue (CFU55)
  • Undergravel filter system includes 4 filter plates (each measuring 11.5" X 11.5") with extra large 1 inch adjustable lift tubes.
  • Filter is suitable for most 40 and 50 gallon aquariums. Clips to hold each section securely together are included.
  • 2 carbon filter cartridges remove odors, and water discoloration by trapping the pollutants in the pores of the carbon.
  • This undergravel filter hides from view for maximum aesthetics. Safe for use in both freshwater and saltwater tanks.
  • Effortless setup and easy maintenance make this premium undergravel filter a must have for all home aquariums.  Simply place filter plates at the bottom of the tank and cover with gravel.
Bestseller No. 2
Penn Plax Premium Under Gravel Filter System - for 29 Gallon Fish Tanks & Aquariums
  • Includes filter plates, air Stones, adjustable lift tubes and filter cartridges
  • Provides powerful biological and chemical filtration
  • Keeps your (up to 29 gallon) tank looking crystal clear
Bestseller No. 3
Penn-Plax Premium Under Gravel Filter System - for 20 Gallon Fish Tanks & Aquariums, Blue (CFU20)
  • Includes filter plates, air Stones, adjustable lift tubes and filter cartridges
  • Provides powerful biological and chemical filtration
  • Keeps your 20 gallon fish Tank or aquarium looking crystal clear
  • Age range description: All Life Stages

Last update on 2020-09-19 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Air-driven Internal Fish Tank Filter

Air-driven internal filters are small. If you own nano aquariums, these types of filters are best. Though small, air-driven filters do an excellent job at keeping small fish in small aquariums healthy.

Best Air-driven Internal Fish Tank Filters

Bestseller No. 1
AquaCity Corner Filter Aquarium Fish Tank Internal Air Driven Filter with Media XY-2008
  • Supply the water with much needed oxygen, For tank size up to 5-10 Gallons
  • Reduce noise from air pump and consume lowest wattage.
  • Multi-layer media, easy to move and clean.
  • Top layer of white filter pad provides a mechanical filtration.
  • Black bio-sponge and ceramic rings with gravel provide biochemical filtration.
Bestseller No. 2
hygger 6-10 Gallon Aquarium Bubbler Filter Air Driven Small Fish Tank Sponge Filter for Betta Fish Shrimp Tank
  • Ultra Quiet Betta Filter - this air-driven fish tank filter is a motor free filter, super quiet, can only hear the smoothing sound of bubble bursting in the water surface
  • Effective Filtration - Mechanical pre-filter sponge captures debris and activated carbon for clean, clear aquarium water. Mini white bubbler stone produces constant, soft bubbles to agitate water, slow flow is great for betta fish, fry and shrimp
  • Compact - Single small filter measures 4.1" x 0.8" x 7.6", recommend for 2-5 gallon fresh and salt water aquariums ; Dual filter measures 7" x 0.8" x 7.6", recommend for 6-10 gallon freshwater and saltwater aquariums
  • Single sponge filter kit comes with 1 filter+ 3 packs filter cartridges + 1 white air stone+ 1 hanging clip. Dual sponge filter kit comes with 2 filters+ 6 packs filter cartridges + 1 white air stone + 2 hanging clips. Replace filter cartridge every 2-4 weeks depends on how many fish you house
  • Easy to install - Connect aquarium filter with air tubing to air pump and ready to go (please note that 3/16 inch air tubing and air pump are excluded). Two suction cups and one hanger helps filter stays in place, no floating. Must be install vertically
SaleBestseller No. 3
UPETTOOLS Aquarium Biochemical Sponge Filter, Ultra Quite Aquarium Air Pump Double Head Bio Sponge Fish Tank Foam Filter
  • 【Multi-filtration Functions】Upettools sponge filter combines single scientific 7-layer ribbing shape sponge design, which can quickly established a bio-filter, improve purifying water quality, and the oxygen port can rotate 360 degrees without dead ends, keep your fish tank crystal clear and clean.
  • 【Special Ceramic Bio Filter Media】Upettools aquarium sponge filters compatible with one container with ceramic bio filter media inside, which help to remove harmful substance and increase oxygen level in your tank, you can replace the filter media to enhance water quality.
  • 【Removable Sponges 】 You can take down the sponge from the filter easily to clean or replace it. Sponge filters provide both mechanical and biological filtration, traps floating debris and protect your baby fish from being sucked up into the filter.
  • 【Easy to Set Up】Simply install an airline into the unit and turn on the air pump, great way to clean and oxygenate your tanks. Don't use tap water to clean it, simply squeeze the sponges in tank water.
  • 【Max Suit for 55GAL Fish Tank】Compatible with 2 suction cups, can be installed anywhere and can be easily hidden on the back wall of the aquarium. Suitable for freshwater & saltwater and all kinds of ornamental fish breeding, breeding and fish formation, especially for colorful fairy, small fish,shrimp tank, betta tank etc.

Last update on 2020-09-22 / Affiliate links / As an Amazon Associate this website may earn from qualifying purchases.

Benefits Of Using An Aquarium Filter

  • Less stressful for fish – fish tank filters reduce the frequency at which you need to physically clean your tank.
  • Less maintenance – helps reduce waste/keep water clear and clean (in addition to bottom feeders/UV Lights).
  •  Removes excess food that your fish don’t eat, reducing the risk of ammonia spikes, overfeeding, algal blooms.

How To Choose An Aquarium Filter?

The main things to consider when buying an aquarium filter are:

Aquarium Tank Size

The size of your fish tank will limit the kind of filter you can use. For example, not all fish tank filters work with all sizes of fish tanks. When buying a filter for your aquarium, always check the recommended tank size. If you’re buying online, it’s usually in the description. If you’re buying in a store, ask the store clerk for help.

Water Flow Rate

The faster the water flow rate of your aquarium filter, the more water it can clean per hour. Depending on the size of the tank, always choose the filter with a higher water flow rate.

Read Reviews

If you’re not sure about a filter or think that the features are too good to be true, look for reviews online. An excellent place to start is Amazon. Find the product and look through the reviews to get an idea of what you’re about to buy. You might even find some useful tips in the review section.

Conclusion

While each filter is different, they all help to keep your aquarium clean. Choose an aquarium filter that best suits your setup taking into consideration the size of your tank and space around the tank. Be sure that the filter can fit your aquarium. Any of the above best fish tank filter systems can help keep your aquarium water clean and clear depending on your needs.

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