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♻️ Keep your tank thriving, not just clean!
Fluval U Underwater Filter BioMax is a granular bio media designed to fit Fluval U2, U3, and U4 filters. Its complex pore structure promotes beneficial bacteria growth, effectively reducing ammonia and nitrate in both freshwater and marine environments. With a focus on sustainable maintenance—replacing only half the media at a time—it ensures a stable biological cycle, backed by over 3,500 positive reviews and trusted by aquarium enthusiasts worldwide.
| ASIN | B001XRR2IM |
| ASIN | B001XRR2IM |
| Allergen Information | Nut Free |
| Best Sellers Rank | #32,444 in Pet Supplies ( See Top 100 in Pet Supplies ) #353 in Aquarium Filter Accessories |
| Brand Name | Fluval |
| Customer Reviews | 4.8 4.8 out of 5 stars (3,547) |
| Date First Available | August 19, 2004 |
| Global Trade Identification Number | 00015561104951 |
| Included Components | Fluval U Underwater BioMax Filter |
| Is Discontinued By Manufacturer | No |
| Item Form | Granules |
| Item Type Name | Hagen FLUVAL"U"FILTER BIOMAX;170G |
| Item Weight | 0.1 Pounds |
| Item model number | A495 |
| Liquid Volume | 110 Liters |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer Part Number | A495 |
| Model Number | A495 |
| Product Dimensions | 2.7 x 1.5 x 10.6 inches; 1.6 ounces |
| Target Species | Fish |
| UPC | 015561104951 |
| Unit Count | 1 Count |
| Warranty Description | Manufacturer Warranty |
B**S
Good Fluval U Bio Media for the underwater filters. Good Price. Largest package volume that I can find for these.
The Fluval U Undewater Filter BioMax works as expected with my Fluval U filters. This is the largest packaging of it that I have seen, so I always buy it here on Amazon because of the price versus getting it at the local fish store. I have Amazon Prime, so I get Free 2-day shipping and I don't have to pay for shipping on my orders which is very nice. If Fluval made these in a larger package volume, I would buy that. Make sure you only remove half your bio media when you clean or make changes in your filter so to make sure you maintain a decent established bacterial content in your tank to maintain a working cycle. Don't wash or clean under the tap, or the chlorinated water will kill off the good bacteria especially on the bio- media you are keeping in the filter. Rinse with tank water if necessary. I definitely recommend these for your Fluval U Underwater Filter. They are the BioMax media that you use with the filter. You can add other things as well into the cartridge chamber like carbon, zeo-carbon or ammonia removers if you need it. Fluval has them available for sale as well, and they are available on Amazon. Fluval Carbon, 100-gram Nylon Bags - 3-Pack Fluval Zeo-Carb, 150 Gram, 3-Pack Nylon Bags Fluval Ammonia Remover, 180-gram Nylon Bags - 3-Pack Make sure you are buying the correct BioMax bio media. These are often mistakenly confused with the larger BioMax Bio Rings which will not work or fit in the Fluval U series underwater filters.
M**D
Worth it
They work for my cichlids tank is definately cleaner
D**.
Great quality
Great quality, go with the name brand and not off brands. Trust what you’re putting into your tank.
B**9
Works
Works like they should
S**N
You Can Never Go Wrong With Fluval.
Fluval always makes a great product. My tank has been really healthy after adding the product. I will buy this product again.
M**A
Works Well
It comes already in a mesh bag, so that is nice. I was worried I would have had to go out an buy one, but it comes included. There are nice and porous. Good for my aquarium
T**Y
Great !
This is great!
P**R
Perfect for 30 gallon tank
I replaced a hanging filter with this. So quite and works beautifully
Trustpilot
2 weeks ago
1 month ago