Fluval 103 Foam Block 2-Pack (Fluval A-1430) for all Hagen Fluval 103 filters
For freshwater and marine environments
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The Fluval Foam Filter Insert is designed specifically for use with the Fluval Filter Module. It effectively removes particulate matter mechanically. It also allows thriving populations of beneficial nitrifying bacteria to aid in the establishment and maintenance of the biological balance in the aquarium.
