Fluval U2 Internal Filter Foam Pad

Cazaar

Fluval Underwater Filter BioMax 170g Specifically designed for the Fluval U filters, BIOMAX provides an optimal environment for the colonization and growth of beneficial bacteria. Suitable for... Fluval U2 Filter (A470) Fluval U3 Filter (A475) Fluval U4 Filter (A480) Geniune Fluval filter media Biological filter media Complex pore system provides large surface area for beneficial bacteria Reduces and controls ammonia and nitrate Suitable for freshwater, saltwater or reptile environments

Amazon

Promotes growth of beneficial bacteria Fits the Fluval U2, U3 and U4 Filters Replenish only half at one time Works in freshwater or marine environments