The Fluval A417 is a pre-filter cartridge for use with the following aquarium filtration system:
The Hagen A417 - Fluval G3 Fine Pre-Filter Cartridge traps debris for effective mechanical filtration. This Fluval pre-filter allows solid wastes to break down into soluble wastes and regular cartridge rinsing is recommended. This Fluval G3 replacement is for daily use in marine aquariums or can be used as a polishing cartridge for freshwater aquariums.
The Fluval A417 specifications: