Specifically designed for Fluval 306/406 and 307/407 canister filters, Bio-Foam+ foam blocks work twice as hard as an effective filter media for mechanical as well as biological filtration.
Constitute a mass of mechanical and biological filtration;
Features a large porous surface that supports the expansive proliferation of beneficial (nitrifying) bacteria;
Effectively trap small particles and debris, especially those that are not retained by the foam during the first stage of filtration;
Are custom-fitted specifically for 06 and 07 series filters to increase filtration efficiency;
Help create a healthy aquatic environment and ideal water conditions;
Should be rinsed every 3 months;
Should be replaced every 6 months;
Come in a handy pack of 2;
Suitable for freshwater and saltwater aquariums.