The Fluval A1470 is aquarium filter media that filters the following from aquarium water:
The Fluval A1470 Aquarium Pre-Filter Media - 750 gram consists of chemically inert ceramic rings. This Fluval prefilter prevents clogging of active media in later filtering stages, reducing the need for frequent replacement. This replacement aquarium filter is permanent, and only needs occasional rinsing.
The Fluval A1470 specifications: