Editor's Choice - Our Favorite CNZ Aquarium Filter Accessories

1. CNZ Aquarium Filter Media Kits

User Ratings: 77 2

CNZ CNZCBR2PK First Impressions

"Works as expected."

The Tetra Medium bio-bag slip easily on an original Top Fin plastic holder. For my smaller fish tank I find that it is just enough. I have a Top Fin 10 power filter and these cartridges fit perfectly. Does the job and price was less or at least same as big retailers. Of course you will need to let the silicone cure before installing in water. Luckily I'm using powerheads and the weight of it helps hold it in place. Fun to modify your filter and clean tank as well.

  • CNZ Aquarium Filter Media Kits
  • Removes odor, colors, organic pollutants
  • Removes toxic compounds, medications
  • Extremely porous ceramic media for efficient biological filtration.
  • Clarify your water naturally and cultivate beneficial bacteria with these Polypropylene Bio-balls
  • increase dissolved oxygen levels
  • Manufacture: CNZ
  • Product Dimensions: 8 x 7 x 5 inches; 5 Pounds
  • Editor's Impressions Of The CNZ CNZCBR2PK
  • Quality [star rating='4.7']
  • Value For Money [star rating='4.1']
  • Affordability [star rating='3.6']

CNZ CNZCBR2PK Final Thoughts

"Glad I bought 2."

It was nicely packaged and is a high quality filter material. I use two layers of floss before the water goes to and through my chemical media. I rinsed and reuse same pad again 3 times and trashed later. But a small simple rubber band fixed the issue quickly. Small amounts of these bubbles can also help oxygenate the water over time. It includes 12 mesh filter bags& 12 packets of charcoal. This is great for transporting aquarium life from location to location too.

Overall Score
4.6

[star rating="4.6"]
(1108 Points)

2. GOLDEAL Bio Balls Ceramic Rings Set, Aquarium Biological Filter Media with Mesh Bag for Fish Tank an...

User Ratings: 67 4

GOLDEAL First Impressions

"This was a great deal."

We operate a saltwater bait store, dealing in live shrimp and bull minnows. I was having a problem with tiny fish getting sucked into the inlets. This filter system doesn't come with everything to you need. We use this product to the extreme. Because they are the smart thing to do when you keep aquariums. We use this product to the extreme. Don't get anything smaller than 750VA as you don't want to overload them.

  • GOLDEAL Bio Balls Ceramic Rings Set, Aquarium Biological Filter Media with Mesh Bag for Fish Tank and Pond, Fish Tank Filter, Decorations, Accessories (500g, 1.1lb)
  • 【12 Filter Media】These include volcanic rocks, medical stone, zeolite, coral sand, nanometer bacterial rings, infrared bacterial rings, biological beads, bio ball, activated carbon, infrared microspheres, ceramic rings and red breathing rings.
  • 【Easily Improve Water Quality】Placing filter material in fish tank and pond.The product can filter and purify water sources in an all-round way, improve the quality of aquarium water, resolve impurities, stabilize PH, clarify your water naturally and cultivate beneficial bacteria with these bio-balls.and create a good living environment for fish.
  • 【Work as a biological filter media】:Aquarium bio filter is excellent interaction between air and water and gas exchange. The Bio-balls can give a nice home for beneficial bacteria where they can settle and be fed by water and oxygen. They will also promote gas exchange and increase dissolved oxygen levels. So as to form a good ecological cycle.
  • 【Scientific configuration,Rational combination】The mixing ratio of various filtering materials in the product has been calculated.It can also be used in a variety of ways, which can not only solve the problem of fish tank water quality but also save you time.
  • 【Suggestion & Refund Guarantee】The product contains natural ingredients. Please clean it before use.It's best to use water from a fish tank or chlorine-free water for cleaning. If you are not satisfied with the product, we will provide you with 100% refund service.
  • Manufacture: GOLDEAL
  • Editor's Impressions Of The GOLDEAL
  • Quality [star rating='4']
  • Value For Money [star rating='4']
  • Affordability [star rating='3.6']

GOLDEAL Final Thoughts

"5 gallon enchant tank."

I was having a problem with tiny fish getting sucked into the inlets. I also suppose my measuring tape may be off, but I would not think so. Also work great as filler for canisters and other filters. I changed water 4 days in a row and still cloudy. Fill with the supplied carbon and voila. Especially if you have a take with shrimp or baby fish. Most plants won't like the highly oxygenated gravel and will die.

Overall Score
4.4

[star rating="4.4"]
(58 Points)

3. Aquarium Pumps & Filters 16PCS Aquarium Replacement Filter Pads for SUNSUN/ GRECH/ SUPER/ HW-304B CF...

Pet Supplies First Impressions

"5 minutes of work!"

We use this product to the extreme. Fill with the supplied carbon and voila. The other tank is an old AIO retro tank I have with a media rack in it. I have always had an undergravel filter and my aquariums. I had to rinse the sponges after about 2. Any floating debri will get caught in a sponge intake on the reverse power head kit. And provide a few low current areas in the tank for fish who are stressed to rest.

  • Aquarium Pumps & Filters 16PCS Aquarium Replacement Filter Pads for SUNSUN/ GRECH/ SUPER/ HW-304B CF500
  • Aquarium Pumps & Filters 16PCS Aquarium Replacement Filter Pads for SUNSUN/ GRECH/ SUPER/ HW-304B CF500#0088/17
  • Manufacture: Pet Supplies
  • Editor's Impressions Of The Pet Supplies
  • Quality [star rating='5']
  • Value For Money [star rating='4.1']
  • Affordability [star rating='4.4']

Pet Supplies Final Thoughts

"Hope this helps!"

This is a lot of filter pad for your money. I keep tubes of clear silicone sealer around. But a small simple rubber band fixed the issue quickly. Fish that are constantly swimming hard will tire and die from stress. It eventually begins to decompose into ammonia which is harmful to your fish. Don't shut it off for more than a few minutes at a time. Lets start with the amount of filter material you get.

Overall Score
5.0

[star rating="5"]
(6 Points)

4. SunGrow Sponge Underwater Corner Aquarium Filter, Works for Tropical Fish & Breeder Aquarium, Slow C...

User Ratings: 65 6

SunGrow First Impressions

"Without making a mess!"

Did all of mine The same, never ripped a one and they all fit like a glove. Still, the price is of course fine at 4 for 6. Most plants won't like the highly oxygenated gravel and will die. The first piece does get a bit dirty and usually only lasts a week. For my smaller fish tank I find that it is just enough. If you have a nano tank with filter these would be perfect for that setup. If you have several aquariums, use separate UPS backups.

  • SunGrow Sponge Underwater Corner Aquarium Filter, Works for Tropical Fish & Breeder Aquarium, Slow Current, Perfect for Fry & Small Fish, Must-Have for Aquarium Hobbyist
  • ✔MOST SUITABLE FILTER FOR BETTAS AND IDEAL FOR BREEDING TANKS --- If fish in your aquarium do not thrive in strong currents, they need SunGrow Sponge Filter. The filter produces required gentle filtration. As the suction is not being created by a pressurized pump, it is also a fitting choice for breeding tanks. The baby fish won’t be put in danger during filter intake. Plus the microorganisms on the surface of the sponge can also serve as an additional food source for the growing fish.
  • ✔MAKES YOUR WEEKLY TASKS LESS FREQUENT --- This reliable tool is also the easiest method of filtration for your Betta tank. Changing cartridges of your filter media weekly with this double sponge filter will no longer be necessary. Cleaning it every few weeks by submerging it in the used aquarium water, gently squeeze then release a few times to remove collected particulate matter. This is the doing the job more economically and more efficiently.
  • ✔DOUBLE FILTRATION EFFECT, IDEAL FOR 120 LITRES/32 GALLON-TANKS OR LESS --- In the process that it traps floating debris and gives protection to your baby fish from being sucked up, mechanical filtration is taking place. On the other hand, biological filtration happens when beneficial substance was able to colonize the sponge that facilitates break-in cycle. The filter is ideal for tanks with up to 120 liters/32 gallons capacity.
  • ✔CAN BE USED AS PRE-FILTER OR SECONDARY FILTER TOO --- If combined with HOB (Hang on Back) filters, it helps keep large debris from entering the canister and will also allow the cartridges to last. This amount of particles caught by the sponge keeps the canister from blockage.
  • ✔EASY TO INSTALL, MAINTAIN AND CLEAN --- Mount this easily anywhere in your aquarium with the 2 suction cups included in the pack. It can also be placed on the back wall should you want to have it hidden. Just install an airline into the unit and turn on the air pump when you set it up. Remember to have regular maintenance and simply rinse and squeeze sponge in tank water.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Quality [star rating='3.8']
  • Value For Money [star rating='4.4']
  • Affordability [star rating='4.9']

SunGrow Final Thoughts

"Good product."

You can put power heads on the riser tubes to increase the flow through the filter. I replace my filter material in my IM Nuvo 20 reef tank every week. It's a pain in the butt to put together the directions don’t do it that well. I will always buy these here on Amazon for the price savings. I have always had an undergravel filter and my aquariums. I have used UG filters for many years. The Tetra Medium bio-bag slip easily on an original Top Fin plastic holder.

Overall Score
4.3

[star rating="4.3"]
(23 Points)

5. Sera Siporax Pond 25 mm 50 L, 24.2 lb. Aquarium Filter Accessories, White (8480)

User Ratings: 50

Sera 8480 First Impressions

"Easy to use repeatedly."

Replace prefilter on pump inlet while filter is running. I don't advise using a UG filter as the only filtration source in large tanks. Customizable in terms of media used. I also suppose my measuring tape may be off, but I would not think so. You can cap off the ones you don't want to use. It works okay for now but I hope it does not mess up my filter in the long run. Plenty strong to support the rocks and gravel in my tank without sagging.

  • Sera Siporax Pond 25 mm 50 L, 24.2 lb. Aquarium Filter Accessories, White (8480)
  • Included Components: All Glass Filter Media
  • All glass biological filter medium
  • Available for fresh- and saltwater aquariums as well as garden ponds
  • Harbors aerobic and anaearobic bacteria
  • Three dimensional pore structure
  • Innovative high quality mechanical filter media
  • Filters even finest particles, such as sludge and floating algae
  • For crystal clear water within 24 hours
  • Manufacture: Sera North America, Inc.
  • Product Dimensions: 11.81 x 15.75 x 22.83 inches; 24.2 Pounds
  • Editor's Impressions Of The Sera 8480
  • Quality [star rating='3.5']
  • Value For Money [star rating='3.3']
  • Affordability [star rating='4.2']

Sera 8480 Final Thoughts

"5 gallon tank."

Replace prefilter on pump inlet while filter is running. I had a 90 gallon aquarium that I did not use an undergravel filter in. It made no sense why one was ten and the other was twenty. I have a Top Fin 10 power filter and these cartridges fit perfectly. Better than branded media filters cartridges. The air stones, plastic tubing, and charcoal were provided which one would expect. It was nicely packaged and is a high quality filter material.

Overall Score
4.0

[star rating="4"]
(2 Points)

6. 10x Aquarium Fish Tank Undergravel Plastic Filter Board Aquarium Accessory

User Ratings: 56

Flameer First Impressions

"STICK WITH THE ORIGINAL."

I missed it in my opinion these filters are a must have. Keep your stocking of creatures low. They are easy to clean but are very small. Right now I am letting the filter work it's magic. This improves flow and prolongs time between cleaning. For my smaller fish tank I find that it is just enough. I double the size and fold them and put the bagged carbon between the layers.

  • 10x Aquarium Fish Tank Undergravel Plastic Filter Board Aquarium Accessory
  • High efficiency, eco-friendly and portable.
  • This undergravel filter hides from view for maximum aesthetics. Safe for use in both freshwater and saltwater tanks.
  • The filter plate circulates water through the gravel bed and oxygenates it for beneficial bacteria growth.
  • Simply place filter plates at the bottom of the tank and cover with gravel.
  • Material: Plastic. Size(LxWxH):Approx. 14x7x1.7cm/5.51x2.76x0.67inch
  • Manufacture: Flameer
  • Editor's Impressions Of The Flameer
  • Quality [star rating='4.5']
  • Value For Money [star rating='4.6']
  • Affordability [star rating='3.4']

Flameer Final Thoughts

"5 gallon tank."

Within a matter of hours I now have a crystal clear tank with pristine water. I had to rinse the sponges after about 2. Right now I am letting the filter work it's magic. If you have several aquariums, use separate UPS backups. Lets start with the amount of filter material you get. I took off two points because the pictures are misleading. It eventually begins to decompose into ammonia which is harmful to your fish.

Overall Score
4.0

[star rating="4"]
(6 Points)

7. Marineland Ammonia neutralizing zeolite blend aquarium carbon media

User Ratings: 80 1

MarineLand PA0391 First Impressions

"I have 2 tanks."

That's a long time if you knew how nasty that many shrimp and minnows can be! But by two weeks, the output did drop. Did all of mine The same, never ripped a one and they all fit like a glove. Customizable in terms of media used. My tank is 12x36 so I utilized 3 of the panels. You will also need to replace their rechargeable batteries about every 2 years or so. Does the job and price was less or at least same as big retailers.

  • Marineland Ammonia neutralizing zeolite blend aquarium carbon media
  • REMOVES AMMONIA: Blend of Black Diamond Premium Activated Carbon and Zeolite removes toxic ammonia and impurities.
  • FOR FRESHWATER: Ideal for all freshwater aquariums and ponds.
  • TEST FREQUENTLY: Test water regularly for ammonia levels and add Diamond Blend as instructed.
  • MARINELAND FILTRATION PRODUCTS: Count on Marineland brand for the most reliable, technically advanced aquariums and accessories on the market.
  • Manufacture: Marineland
  • Product Dimensions: 3.75 x 3.75 x 5.5 inches; 1.44 Pounds
  • Editor's Impressions Of The MarineLand PA0391
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

MarineLand PA0391 Final Thoughts

"Hehehehehe shhhhh."

The first piece does get a bit dirty and usually only lasts a week. I had to take a blade and run it through all the slats because the factory doesnt q. Just be super careful with the tubes! I just changed it today and the water is crystal clear-- no problems. The filter material itself is good quality material too that doesn't break open. This improves flow and prolongs time between cleaning. The other tank is an old AIO retro tank I have with a media rack in it.

Overall Score
4.7

[star rating="4.7"]
(573 Points)

8. Penn-Plax Premium Under Gravel Filter System - for 29 Gallon Fish Tanks & Aquariums, Blue (CFU29)

User Ratings: 69 4

Penn-Plax CFU29 First Impressions

"Works well."

Work perfect on my shrimp tank to keep them out of the filter. The filters fit fine and I was happy to see that some carbon packs were included. But a small simple rubber band fixed the issue quickly. I use two layers of floss before the water goes to and through my chemical media. I have been using an Aquaclear 50 on a 20g long planted tank. Right now I am letting the filter work it's magic. You can cap off the ones you don't want to use.

  • Penn-Plax Premium Under Gravel Filter System - for 29 Gallon Fish Tanks & Aquariums, Blue (CFU29)
  • 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
  • Age range description: All Life Stages
  • Manufacture: Penn Plax, INC.
  • Product Dimensions: 14.13 x 1.25 x 11.25 inches; 1.06 Pounds
  • Editor's Impressions Of The Penn-Plax CFU29
  • Quality [star rating='4.1']
  • Value For Money [star rating='4.1']
  • Affordability [star rating='5']

Penn-Plax CFU29 Final Thoughts

"5 gallon enchant tank."

It comes with the filter bag, bag frame, and charcoal media all separate. This filter system doesn't come with everything to you need. I have found you really have to scrub the outside to get everything cleaned out. I had to rinse the sponges after about 2. But a small simple rubber band fixed the issue quickly. My pad collected yellow cloudy color also all waste. Fun to modify your filter and clean tank as well.

Overall Score
4.5

[star rating="4.5"]
(347 Points)

9. LTWHOME Foam Filter Pads Suitable for Fluval FX4 / FX5 / FX6 (Pack of 12)

User Ratings: 78 2

LTWHOME First Impressions

"It's nice."

The foam is not coarse as illustrated; it's finer and denser. We rinse the filters 2x a day and they remain in continuous 24 hour operation. I have always had an undergravel filter and my aquariums. 7in, which is only about half the length of the unit. Lets start with the amount of filter material you get. Fun to modify your filter and clean tank as well. I don't advise using a UG filter as the only filtration source in large tanks.

  • LTWHOME Foam Filter Pads Suitable for Fluval FX4 / FX5 / FX6 (Pack of 12)
  • Custom designed and manufactured for the Fluval FX5 Filtration Systems
  • Enhances biological filtration
  • Provides efficient water flow with less clogging for long lasting filtration
  • Good for freshwater & saltwater environments
  • 385mm x 85mm x 40mm
  • Manufacture: Ningbo Haishu HuaxinYicheng Trade Co., Ltd.
  • Product Dimensions: 15.2 x 3.3 x 1.6 inches; 12 Ounces
  • Editor's Impressions Of The LTWHOME
  • Quality [star rating='5']
  • Value For Money [star rating='4.7']
  • Affordability [star rating='4.9']

LTWHOME Final Thoughts

"Fit great into my filter."

I will keep using these and recommend them to anyone. This improves flow and prolongs time between cleaning. Don't get anything smaller than 750VA as you don't want to overload them. Don't get anything smaller than 750VA as you don't want to overload them. It was a struggle to keep the water clear before i got the goldfish. These work great as pre filter sponge on my quiet flow 10. It was nicely packaged and is a high quality filter material.

Overall Score
4.7

[star rating="4.7"]
(108 Points)

10. Powkoo Sponge Filter Aquarium Filter Sponge Shrimp Betta Fish Tank Filter with Media

User Ratings: 58 7

Powkoo First Impressions

"So far so good!"

I change my filters once a month, so the 12 pack lasts me a year! But if you don't weekly vacuum it up, it will eventually clog the filter. Of course you will need to let the silicone cure before installing in water. I rinsed and reuse same pad again 3 times and trashed later. Fun to modify your filter and clean tank as well. For my smaller fish tank I find that it is just enough. The concentration of flow will mean faster clogging, lower flow and motor strain.

  • Powkoo Sponge Filter Aquarium Filter Sponge Shrimp Betta Fish Tank Filter with Media
  • Sponge filters provide both mechanical and biological filtration - Traps floating debris and protect your baby fish from being sucked up into the filter, aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle
  • Scientific 5-layer ribbing shape sponge design, it quickly established a bio-filter, more surface area for beneficial bacterial to colonize and faster cycling, keep your fish tank crystal clear and clean
  • It has a media chamber with ceramic bio filter media inside, will help to remove harmful substance and increase oxygen level in your tank, you can replace the filter media to enhance water quality.
  • 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; Easy to clean: simply squeeze the sponges in tank water.
  • 【Fits fish tank size: 5 to 20 gallon】Easy to use: comes with 2 suction cups, can be installed anywhere and can be easily hidden on the back wall of the aquarium; suitable for shrimp tank, betta tank, breeder tank, goldfish, discus, guppies, fry, baby fish or other fish.
  • Manufacture: Powkoo
  • Editor's Impressions Of The Powkoo
  • Quality [star rating='4.4']
  • Value For Money [star rating='3.1']
  • Affordability [star rating='3.1']

Powkoo Final Thoughts

"Maybe I'll call them."

Why not save some money to put towards more fish or supplies. I had a 90 gallon aquarium that I did not use an undergravel filter in. Lets start with the amount of filter material you get. I just changed it today and the water is crystal clear-- no problems. We rinse the filters 2x a day and they remain in continuous 24 hour operation. I have always had an undergravel filter and my aquariums. This is great for transporting aquarium life from location to location too.

Overall Score
4.1

[star rating="4.1"]
(23 Points)

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