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Fluval Foam provides mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the Module Stack. Although the primary purpose of Fluval Foam is mechanical filtration, biological activity will eventually occur within its pore structure.
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Fluval Foam Filter Block
Fluval Aquarium Filter Foam Blocks provide mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack. Although the primary purpose of Fluval Foam is mechanical filtration, biological activity will eventually occur within its pore structure. These Fluval Aquarium Filter Foam Blocks also enhance biological filtration and are suitable for the Fluval 204/205/206 and Fluval 304/305/306 Aquarium Filters.
Fluval Filters
Model Aquarium Capacity 25 US Gallons 45 US Gallons 70 US Gallons 100 US Gallons 160 US Gallons 400 US Gallons Dimensions 15 X 6 X 8 inches 18 X 7 X 8 inches 18 X 7 X 10 inches 20 X 8 X 10 inches 10 x 9 x 13 inches 16 x 16 x 21 inches Pump Output 145 US Gal/h 206 US Gal/h 303 US Gal/h 383 US Gal/h 650 US Gal/h 925 US Gal/h Filter Circulation 95 US Gal/h 121 US Gal/h 206 US Gal/h 245 US Gal/h 265 US Gal/h 538 US Gal/h Head Height (max.) 4.8 ft 4.8 ft 5.6 ft 7.5 ft 4.8 ft 7.6 ft Media Capacity 3.2 Liters 4.6 Liters 6.6 Liters 8.5 Liters 9.5 Liters 11.5 Liters Wattage 120V/60Hz: 10W 120V/60Hz: 10W 120V/60Hz: 16W 120V/60Hz: 23W 120V/60Hz: 27W 120V/60Hz: 43WFluval Media
Fluval Carbon, 100-gram Nylon Bags - 3-Pack
Fluval Carbon Filter Media Insert is capable of adsorbing most liquified impurities and dyes present in aquarium water. It does not contain phosphates and will not change the pH of the aquarium water.
Fluval Foam Filter Block (204/205/306 & 304/305/306)- 2-Pack
Fluval Aquarium Filter Foam Blocks provide mechanical straining of particulate waste. It prevents particulate waste from prematurely clogging other filter media in the module stack.
Fluval Biomax Bio Rings - 500 grams/17.63 ounces
Fluval BioMax Media Inserts have a complex pore system creating an optimal environment where beneficial bacteria can thrive.
Fluval Ammonia Remover, 180-gram Nylon Bags - 3-Pack
Fluval Ammonia Remover is a natural ion-exchange media designed to remove toxic ammonia as water passes over it. Controlling ammonia levels reduces stress on fish.
Fluval Clearmax Phosphate Remover Filters, 3.5 Ounces - 3-Pack
Clearmax Phosphate Remover traps phosphate, nitrate and nitrite. It also reduces odors, makes maintenance easier and provides crystal clear water to create ideal conditions for fish.
Fluval Zeo-Carb, 150 Gram, 3-Pack Nylon Bags
Fluval Zeo-Carb is a premium blend of research grade Fluval Carbon and Fluval Ammonia Remover. Working together, these highly effective media eliminate liquefied impurities.
Fluval Fine Filter Water Polishing Pad
Fluval Water Polishing Pads are uniquely designed to fit Fluval Canister Filters. These extra thick micro-fine polyester pads effectively trap micro particles and debris as water passes through.
Fluval Pre-Filter Media - 750 grams/26.45 ounces
Fluval Pre-Filter is designed to capture solid waste before they reach other media. This prevents premature clogging of finer filters and extends their life, reducing media replacements frequency.
Fluval Peat Granules, 500 Gram/17.6 Ounce
Fluval Peat Granules are the all-natural way to soften aquarium water and achieve the pH levels required for breeding and rearing certain tropical fish.
Fluval Bio Foam
Fluval bio-foam combines mechanical and biological filtration. Its porous structure increases surface area for the growth of helpful nitrifying bacteria.
John Lenardo
Reviewed in the United States on March 16, 2025
Good no problems
Karla Dinora Herrera Hernández
Reviewed in Mexico on May 28, 2024
Es un excelente producto para filtro de pecera
g.zaferözan
Reviewed in Turkey on March 30, 2024
fonksiyonu mükemmel
David Early
Reviewed in the United States on January 31, 2024
Inexpensive and effective
Spencer L Miller
Reviewed in the United States on April 8, 2024
It is a good product. My tank is cleaner and I don't have to change the water as often.
Roger
Reviewed in the United States on August 2, 2023
Exactly what I needed great fit good quality
Sapphiresea
Reviewed in Canada on May 9, 2023
Great product. Been using this brand for several years and it’s never let me down. I’ve been maintaining aquariums for many years and proper filtration is paramount for healthy fish. Fluval is my go to product for all my aquarium needs. AAA+Definitely recommend.
Hisham
Reviewed in the United Arab Emirates on July 3, 2022
Item as described. I’m using it for my Fluval 207 external filter.
nicolas
Reviewed in France on February 19, 2020
Parfait comme d'habitude
ShepLady
Reviewed in the United States on April 19, 2020
I cut these and use them in a Aqueon 10G instead of those disgusting pieces that come with the filter. These stay firm, hold the debris and last much longer. Cleaner, safer alternative!
Duane A. Priest
Reviewed in the United States on February 22, 2014
I have a Fluval 304 filter on a 50-gallon freshwater aquarium, and I've been using these foam filters for years. I LOVE the Fluval filter... it's worked consistently and wonderfully for me for quite some time and I've not found any other filter that I've experienced or think would work as well.The Fluval 304 has 4 filtration stages, the first of which is these foam filter blocks. BEWARE... the are sold in packages of two, but the 304 (and 305) filters require FOUR of these blocks. In other words, if you want to completely replace the foam filtration stage, you have to get TWO packages.That being said, the filter works great for me and my aquarium needs only occasional maintenance. I know that there are knock-off products out there, and I've tried some in the past, but the quality of the material hasn't been the same in the ones I've tried. Since the key to making the Fluval filter work is to ensure that the water passes through each filtration stage, it's important that this foam filter block fit properly and maintain its shape. I've had other knock-off products that lose their shape, which disrupts the function of the filter. To me, it's worth it to spend a few bucks more and ensure that the filter works as intended.
Jean1960
Reviewed in the United States on October 30, 2013
This Fluval Foam will last for a very long time; some of my Fluval foam is nearly a year old and not falling apart. The foam works great for keeping a colony of beneficial bacteria. I just rinse by swishing in de-chlorinated water every month or so. Each canister needs 4 blocks. I keep extra on hand. When one falls apart I replace it. But I leave them in as long as possible because I don't want to screw up a cycled tank.This foam goes in a canister which I use for the sole purpose of growing good bacteria. This setup keeps 6 large fish healthy with consistent zero ammonia and nitrites.Bottom rack: Biofoam blocksSide panels - this product1st rack 2nd and 3rd racks I also use a HOB to clean the water. I like the Aqueon above all others for getting water clean, you can't beat it! I insert cut pieces of (bought at Walmart) into the Aqueon - replacing the batting when it gets dirty, at least once a week. It's more economical than buying the Aqueon filter replacements.
Gus
Reviewed in the United States on November 27, 2012
Not much to say. This is the standard brand name filter replacement for 200/300 Fluval canister filter. These slap right in and you don't have to worry about cutting your own filter out of a big block. They last a decent amount of time. Fluval says to only replace them every 6 months. Make sure you don't replace all of them at the same time though because they hold beneficial bacteria for your tank. Luckily they are just cheap enough that I don't feel ripped off buying them, unlike many replacement filters. If they were any more expensive though, it would be a lot cheaper to buy foam filter in bulk and cut it to size. The plus, is that these make doing fishy maintenance only take 10-15 min, and another 10 for a water change.
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