The Hagen A1376 is the correct replacement filter for the following:
The Fluval A1376 - Spec Foam Filter Replacement is a replacement filter for Fluval Spec Aquariums. The Fluval Spec Foam provides efficient mechanical filtration in aquariums by effectively removing large particles and debris. This replacement aquarium filter also provides biological activity within its pore structure.
Fluval A1376 - Spec Foam Filter Replacement specifications: