The Fluval A415 is the correct replacement pre-filter for the following systems:
The Fluval A415 - G3 Pre-Filter Replacement Cartridge is a replacement pre-filter for the Fluval G3 Filter System. The Fluval Pre-filter is designed for daily use to trap suspended debris for mechanical filtration in fresh or marine applications. The Fluval G3 replacement features pleats that effectively capture debris and help reduce the accumulation of waste.
Fluval A415 - G3 Pre-Filter Replacement Cartridge specifications: