Fluval Foam Filter Blocks provide effective first-stage mechanical filtration for Fluval 204/205/206 and 304/305/306 model filters. These foam blocks are custom-fit to trap large particles and debris, with an ideal pore size to allow efficient water passage and prevent clogging.
Traps particles and debris for mechanical filtration
Pore size allows efficient water passage with less clogging
Safe for freshwater and marine aquariums
For Fluval 204/205/206 and 304/305/306 filters
The additional filter surface area provided by this foam also enhances biological filtration.
This site uses Google Analytics which is one of the most widespread and trusted analytics solution on the web for helping us to understand how you use the site and ways that we can improve your experience. These cookies may track things such as how long you spend on the site and the pages that you visit so we can continue to produce engaging content.For more information on Google Analytics cookies, see the official Google Analytics page.We also use social media buttons and/or plugins on this site that allow you to connect with social network in various ways. For these to work, the social networks may set cookies through our site which may be used to enhance your profile on their site, or contribute to other purposes outlined in their respective privacy policies.