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

Dont need it

More of the same when it comes to the Fluval system parts.

I got this to fill the cartridge of my U4 filter. They seem to be working as expected and I am happy with them.

Biological filtering is the way to go. One of the best aspects of the Underwater U series is that they approach water cleanliness through a comprehensive approach, including BioMax. These little white nuggets work like magic for the water of my turtle tank.

Great aquarium filter

The more I learn about filter the more I realize I was wasting money on these,

always a good product

Ive always bought these, theyre great for clearing up the aquarium water.

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

The product is fine and as expected, but the photo shows 170g package, but what arrived was 110g package.