Editor's Choice - Our Favorite External Aquarium Filter Accessories

1. Fluval Underwater Filter

User Ratings: 68 8

Fluval A480A1 First Impressions

"5 minutes of work!"

The filter material itself is good quality material too that doesn't break open. Customizable in terms of media used. Small amounts of these bubbles can also help oxygenate the water over time. Fish that are constantly swimming hard will tire and die from stress. The Tetra Medium bio-bag slip easily on an original Top Fin plastic holder. The measurements are about 9 cm long x 4 cm wide and the hole is about 2 cm. This is great for transporting aquarium life from location to location too.

  • Fluval Underwater Filter
  • Filters debris and provides optimal biological filtration
  • Simple to install and maintain
  • Silent and efficient
  • Ideal supplemental or stand-alone filter, or for installations where external filtration is not possible
  • Comes with 3-way flow control with adjustable output, 2 foam pads, 2 poly/carbon cartridges and 90 grams BioMax; Ideal for 34-65 gallon environments
  • Designed for aquarium up to 65 gallons
  • Use as a primary filter for smaller aquariums, or supplementary filter for larger aquariums
  • Position horizontally for shallow tanks, larger tanks with low water levels, or to create a decorative waterfall feature
  • Manufacture: Fluval
  • Product Dimensions: 4.6 x 5.2 x 14 inches; 2.47 Pounds
  • Editor's Impressions Of The Fluval A480A1
  • Quality
  • Value For Money
  • Affordability

Fluval A480A1 Final Thoughts

"I had one break easily."

It comes with the filter bag, bag frame, and charcoal media all separate. Fun to modify your filter and clean tank as well. But by two weeks, the output did drop. Even its quite costly, but it last long. I've definitely noticed a difference in my water quality. Don't get anything smaller than 750VA as you don't want to overload them. The UG is certainly no exception to that.

Overall Score
4.3


(3770 Points)

Peoples Choice - Other Highly Rated External Aquarium Filter Accessories

2. 4-Pack Fluval-Compatible Replacement Foam Filters - Works with 304 / 305/ 306 / 404 / 405 / 406 Aqua...

User Ratings: 84 3

Evergreen Pet Supplies 14870093 First Impressions

"Works great."

TopFin frame is on the left, Tetra on the right. I can now afford to change all my filters at a fraction of the cost. For my smaller fish tank I find that it is just enough. A great addition to the filtration system. Works well for my low flow Aquaclear 20. I have been using an Aquaclear 50 on a 20g long planted tank. It was a struggle to keep the water clear before i got the goldfish.

  • 4-Pack Fluval-Compatible Replacement Foam Filters - Works with 304 / 305/ 306 / 404 / 405 / 406 Aquarium Canister Filter Models - Equivalent to Bio-Foam A237 - Made in the USA By Impresa Products
  • Fluval (TM) Compatible: Our foam filter pack is designed for perfect compatibility with Fluval (TM) external canister filters models 304 / 305 / 306 (300 liter / 70 gallon) and 404 / 405 / 406 (400 liter / 100 gallon)
  • Highly Effective: Our foam offers top-notch mechanical and biological filtration, capturing small particles that are not picked up in the first filtration stage. The network of pores and large surface area ensure a healthy tank, letting your fish and plants thrive!
  • Made In The USA: Our foam compatible with Fluval filters are made to exact specifications from the highest quality filtration foam and are PROUDLY MADE IN THE USA. Compatible with fresh and saltwater / marine aquariums
  • Value Pack: Our 4-pack of filter foams ensure that you are never without a replacement when you need one. No need to pay top dollar for replacement filters - our filter are ideal for your device
  • Please note: This is an aftermarket product (produced by Impresa Products). We have no affiliation with or endorsement from any of the manufacturers mentioned
  • Manufacture: Evergreen Pet Supplies
  • Product Dimensions: 3 x 2 x 2 inches; 0.81 Ounces
  • Editor's Impressions Of The Evergreen Pet Supplies 14870093
  • Quality
  • Value For Money
  • Affordability

Evergreen Pet Supplies 14870093 Final Thoughts

"Hehehehehe shhhhh."

Most plants won't like the highly oxygenated gravel and will die. My tank is 12x36 so I utilized 3 of the panels. I have always had an undergravel filter and my aquariums. I will be using Koral Filter material from now on. 7in, which is only about half the length of the unit. Most plants won't like the highly oxygenated gravel and will die. I change my filters once a month, so the 12 pack lasts me a year!

Overall Score
4.7


(663 Points)

3. Lefunpets Aquarium Filter, Bio Balls Filter Media, 100PCS Bio Balls Perfect for Aquarium and Pond Fi...

User Ratings: 63 6

Lefunpets First Impressions

"You get what you pay for."

If you have a nano tank with filter these would be perfect for that setup. They do feel a little thin but we'll see how they hold up over time. The first piece does get a bit dirty and usually only lasts a week. I will keep using these and recommend them to anyone. The foam is not coarse as illustrated; it's finer and denser. For obvious reasons, don't put them directly above or below a tank. These have prevented my original problem.

  • Lefunpets Aquarium Filter, Bio Balls Filter Media, 100PCS Bio Balls Perfect for Aquarium and Pond Filter Media
  • 【PERFECT FILTATION】Aquarium Filter Bio Ball that helps clean your water naturally, beneficial to oxidation of oxygen convection exchange, and for reproductive growth of nitrifying bacteria with a huge biochemical surface area.
  • 【MAX SURFACE AREA】Bio-sponge inside provides more surface area for growth of beneficial Bio-spiral bacteria. Many flake structure, internal porous, great for any freshwater or saltwater.
  • 【BETTER EFFECT】The bio ball is idea for external and pressurized filters in aquarium tank, pond filter and fish farm water treatment.
  • 【SAFE FILTER MEDIA】Good to use in different type of filters, encourages growth of biological colonies, more capacity than most biological filter media, reduces and controls harmful ammonia and nitrate.
  • 【PERFECT SHAPE】16mm in diameter. Packaged in mesh filter bags allowing easy cleaning, promote gas exchange and increase dissolved oxygen levels.
  • Manufacture: Lefunpets
  • Product Dimensions: 4.1 x 2.6 x 5.9 inches; 4.66 Ounces
  • Editor's Impressions Of The Lefunpets
  • Quality
  • Value For Money
  • Affordability

Lefunpets Final Thoughts

"I couldn't believe it!"

Keep your stocking of creatures low. I rinsed and reuse same pad again 3 times and trashed later. Replace prefilter on pump inlet while filter is running. For obvious reasons, don't put them directly above or below a tank. Because they are the smart thing to do when you keep aquariums. Make sure to select the Medium size from Tetra. The best part about these in my opinion, is the price.

Overall Score
4.3


(216 Points)

4. OASE Indoor Aquatics Biomaster Thermo

User Ratings: 68 8

OASE Indoor Aquatics 55150 First Impressions

"Unbeatable at this price."

For my smaller fish tank I find that it is just enough. The main part is cleaning, that I need to find out. Did all of mine The same, never ripped a one and they all fit like a glove. I don't advise using a UG filter as the only filtration source in large tanks. Why not save some money to put towards more fish or supplies. I end up cutting a small 2x3 inch square for each of my media baskets. It was a struggle to keep the water clear before i got the goldfish.

  • OASE Indoor Aquatics Biomaster Thermo
  • The Bio master thermos 600 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
  • Integrated heater – Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit
  • EasyClean pre-filter module – Module can be removed separately from the rest of the filter. This reduces maintenance, increases filter efficiency, and extends the life of main filter foams. Customize the pre-filter with coarse 30 ppi, fine 45 ppi, ultra-fine 60 ppi, and activated carbon 45 ppi filter foams
  • No mess maintenance – Integrated safety locking features on the handle, pre-filter, and check valve in the inlet/outlet connection unit, ensure no accidental spillage or messy maintenance
  • Manufacture: OASE
  • Product Dimensions: 9.4 x 9.4 x 19 inches; 18 Pounds
  • Editor's Impressions Of The OASE Indoor Aquatics 55150
  • Quality
  • Value For Money
  • Affordability

OASE Indoor Aquatics 55150 Final Thoughts

"This was a great deal."

I also suppose my measuring tape may be off, but I would not think so. I have been using an Aquaclear 50 on a 20g long planted tank. I purchased this bulk filter media for a Fluval 207 canister filter. I double the size and fold them and put the bagged carbon between the layers. Still, the price is of course fine at 4 for 6. It was easy to assemble and very effective! I rinsed and reuse same pad again 3 times and trashed later.

Overall Score
4.3


(191 Points)

Honorable Mentions - More Top Selling External Aquarium Filter Accessories

5. Aquapapa Multi Layer Filter Media Biochemical Sponge Filters with Extendable Telescopic Air Flow Out...

User Ratings: 49 3

Aquapapa First Impressions

"I would recommend these."

I have always had an undergravel filter and my aquariums. 7in, which is only about half the length of the unit. Don't believe people who tell you they are dangerous for your tank. It was exactly what I needed and fit beautifully. I will always buy these here on Amazon for the price savings. If you don't know much about this just google it. I also suppose my measuring tape may be off, but I would not think so.

  • Aquapapa Multi Layer Filter Media Biochemical Sponge Filters with Extendable Telescopic Air Flow Outlet Air Pump Driven for Betta Fry Aquarium Fish Tank Up to 25 Gallon
  • Provide both mechanical and biological filtration.
  • Simply install an airline into the unit and provide both aeration and filtration for your fish (Air pump sold separately). Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle.
  • Sponge + Ceramic multi layer design. The sponge traps larger waste particles mechanically cleaning the water without trapping baby fish. The porous ceramic material is an ideal home for the cycle bacteria to colonize.
  • Product dimensions: 2.76”W x 7.48”H; sponge and ceramic compartment dimensions: 1.73”D x 4.6”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.
  • Max tank size up to 25 gallon. Package includes: 2 pcs of Sponge filters.
  • Manufacture: Aquanemo Global
  • Editor's Impressions Of The Aquapapa
  • Quality
  • Value For Money
  • Affordability

Aquapapa Final Thoughts

"Good product."

So stock your tanks a few fish at a time. Any floating debri will get caught in a sponge intake on the reverse power head kit. I bought these because I was afraid my shrimp were getting sucked up in the filter. If you're looking for new filters, go with these. I will keep using these and recommend them to anyone. It's also a pretty substantial roll. I was having a problem with tiny fish getting sucked into the inlets.

Overall Score
4.2


(46 Points)

6. V AquaVista Aquatics Háifoss SandFall Filter

V AquaVista Aquatics SFF454824A First Impressions

"They do the job well!"

Fill with the supplied carbon and voila. I don't advise using a UG filter as the only filtration source in large tanks. This improves flow and prolongs time between cleaning. It was easy to assemble and very effective! The first 3 pics are of my RR tank with sump. I purchased this bulk filter media for a Fluval 207 canister filter. It comes with the filter bag, bag frame, and charcoal media all separate.

  • V AquaVista Aquatics Háifoss SandFall Filter
  • Create a Natural looking Waterfall in your Aquarium using flowing sand for a realistic illusion of a natural waterfall
  • NO ASSEMBLY Required - Simply install the unit in your aquarium, plug in the included pump and then add sufficient sand, which is also included.
  • 18 in High x 19 in Wide x 9.5 in Deep (45 cm x 48 cm x 24 cm)
  • Verify internal dimensions of tank minimum opening is 15" (38 cm),
  • Provides mechanical, biological, and chemical filtering at approximately 550 gph with almost no external noise. Biological filter is achieved thru fluidized sand bed technology.
  • Manufacture: AquaVista Aquatics LLC
  • Product Dimensions: 18.9 x 9.45 x 17.72 inches; 20 Pounds
  • Editor's Impressions Of The V AquaVista Aquatics SFF454824A
  • Quality
  • Value For Money
  • Affordability

V AquaVista Aquatics SFF454824A Final Thoughts

"They work great!"

I purchase the 8 pack size Large and fits great on my TopFin 40 Gallon Filter. It was nicely packaged and is a high quality filter material. Does the job and price was less or at least same as big retailers. It comes with the filter bag, bag frame, and charcoal media all separate. We rinse the filters 2x a day and they remain in continuous 24 hour operation. Even its quite costly, but it last long. I use two layers of floss before the water goes to and through my chemical media.

Overall Score
5.0


(2 Points)

7. Algone Aquarium Water Clarifier and Nitrate Remover, 6 Filter Pouches

Algone 1001 First Impressions

"Overall a good product!"

But by two weeks, the output did drop. My tank is 12x36 so I utilized 3 of the panels. I end up cutting a small 2x3 inch square for each of my media baskets. The first piece does get a bit dirty and usually only lasts a week. The box comes with super easy and clear instructions. Better than branded media filters cartridges. The material is a soft and not abrasive at all.

  • Algone Aquarium Water Clarifier and Nitrate Remover, 6 Filter Pouches
  • Creates crystal-clear water
  • Safe for aquatic plants
  • Clears cloudy water
  • Clears green water
  • Treats 330 gallons
  • Manufacture: Algone
  • Product Dimensions: 4.5 x 1.7 x 3.6 inches; 1.6 Ounces
  • Editor's Impressions Of The Algone 1001
  • Quality
  • Value For Money
  • Affordability

Algone 1001 Final Thoughts

"I have 2 tanks."

It was a struggle to keep the water clear before i got the goldfish. Work perfect on my shrimp tank to keep them out of the filter. So here is the product size on the boxes that isn't included in the description! It was nicely packaged and is a high quality filter material. Works well for my low flow Aquaclear 20. Just be super careful with the tubes! Works well for my low flow Aquaclear 20.

Overall Score
4.2


(676 Points)

8. Golden Pearl 10 Pieces Black Pre-Filter Sponge Foam Roll Accessories for Aquarium Fish Tank

User Ratings: 60 7

Golden Pearl First Impressions

"Excellent media!"

I bought these because I was afraid my shrimp were getting sucked up in the filter. I purchase the 8 pack size Large and fits great on my TopFin 40 Gallon Filter. Don't restrict air-flow around them as they do get quite warm. I keep tubes of clear silicone sealer around. It was exactly what I needed and fit beautifully. Customizable in terms of media used. This filter system doesn't come with everything to you need.

  • Golden Pearl 10 Pieces Black Pre-Filter Sponge Foam Roll Accessories for Aquarium Fish Tank
  • Size (L x W): 8*4cm/ 3.15*1.57 inch
  • Inside Diameter: 1.5cm/ 0.56inch
  • Easily connects to filter intake stem ,Single Hole
  • Prevents small and baby inhabitants from being drawn into filter,Enhances biological filtration
  • Package included: 10 Pieces Filter Sponge Foam Roll
  • Manufacture: Golden Pearl
  • Product Dimensions: 1 x 0.1 x 0.1 inches; 0.63 Ounces
  • Editor's Impressions Of The Golden Pearl
  • Quality
  • Value For Money
  • Affordability

Golden Pearl Final Thoughts

"You get what you pay for."

The first 3 pics are of my RR tank with sump. Any floating debri will get caught in a sponge intake on the reverse power head kit. It was a struggle to keep the water clear before i got the goldfish. The other tank is an old AIO retro tank I have with a media rack in it. The foam is not coarse as illustrated; it's finer and denser. I purchase the 8 pack size Large and fits great on my TopFin 40 Gallon Filter. Fun to modify your filter and clean tank as well.

Overall Score
4.2


(50 Points)

9. Alegi Aquarium Filter Pad Media Roll-1 inch Thick- Cut to Fit Fish Tank Pond Canister Filter Media,P...

User Ratings: 55

ALEGI First Impressions

"Looks great!"

I bought these to put over the inlet to the filters in my aquariums. Plenty strong to support the rocks and gravel in my tank without sagging. Of course you will need to let the silicone cure before installing in water. The concentration of flow will mean faster clogging, lower flow and motor strain. You can cap off the ones you don't want to use. I have found you really have to scrub the outside to get everything cleaned out. Customizable in terms of media used.

  • Alegi Aquarium Filter Pad Media Roll-1 inch Thick- Cut to Fit Fish Tank Pond Canister Filter Media,Pond Filter,Circulation System(4.8 inch by 60 inch)
  • Provides mechanical filtration
  • Promotes nitrogen cycle reduce the death rate of fish
  • Can be used again after cleaning
  • Cuts to fit and replace any pad type filter
  • 60" long x 4.8" wide x 1" thick
  • Manufacture: Alegi
  • Editor's Impressions Of The ALEGI
  • Quality
  • Value For Money
  • Affordability

ALEGI Final Thoughts

"Works as expected."

The Tetra Medium bio-bag slip easily on an original Top Fin plastic holder. The air stones, plastic tubing, and charcoal were provided which one would expect. Keep your stocking of creatures low. I even used some in my Fluval 206 canister filter on my freshwater tank. If you have a nano tank with filter these would be perfect for that setup. My pad collected yellow cloudy color also all waste. It made no sense why one was ten and the other was twenty.

Overall Score
4.5


(19 Points)

10. Aqueon Filter Cartridge, Large, 6-Pack

User Ratings: 85 1

Aqueon 100106088 First Impressions

"Overall a good product!"

They do feel a little thin but we'll see how they hold up over time. I use this in my filter for aquarium 55 gal. The box comes with super easy and clear instructions. And provide a few low current areas in the tank for fish who are stressed to rest. The more you overpopulate your tank, the more frequently you'll have to do this. I purchased these for an aquarium at school. Luckily I'm using powerheads and the weight of it helps hold it in place.

  • Aqueon Filter Cartridge, Large, 6-Pack
  • Fits Aqueon QuietFlow Filter: LED PRO Size 20 & up and E Internal 40 gallon
  • Ready-to-use cartridge contains high quality activated carbon that keeps water clean, rinse before replacing
  • Installs in seconds: align cartridge bottom key slot for an accurate fit inside the Filter
  • For optimal performance, change approximately every 4 to 6 weeks
  • Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria
  • Manufacture: Central Garden & Pet
  • Item Weight: 12 ounces
  • Product Dimensions: 5.6 x 8.4 x 4 inches
  • Editor's Impressions Of The Aqueon 100106088
  • Quality
  • Value For Money
  • Affordability

Aqueon 100106088 Final Thoughts

"Nada, zilch, nugga."

These have prevented my original problem. Cut slightly oversized, it seems very effective as a particulate filter. If you don't know much about this just google it. For obvious reasons, don't put them directly above or below a tank. The Tetra Medium bio-bag slip easily on an original Top Fin plastic holder. Customizable in terms of media used. They are easy to clean but are very small.

Overall Score
4.8


(3564 Points)

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