Fluval U Underwater Filter BioMax, Replacement Aquarium Filter Media, A495

Bio Max works.

Works great

Really like the small size media. Dont have anything else to say. These reviews require too many words. That is all.

Works great

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 dont 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. Dont 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.

Extremely pleased with this purchase. It is exactly as described and is just what I wanted. Thank you!

This product is much cheaper here than it is at my local pet store this product does everything it says

Great product is helps keep my sisters turtle tank clean.

Used in turtle filter to clean the water

We have a couple turtles and this has helped a lot. I keeps the water cleaner for longer, and keeps it from looking yellow.