The Hagen A1379 is the correct renewal sachet for the following:
The Fluval A1379 Edge Carbon Renewal Sachets 3-Pack is a three pack of Carbon Clean & Clear Renewal Sachets for Fluval Edge Aquariums. This replacement aquarium filter rids your tank of toxins and maintains high quality water for your fish. These carbon renewal sachets provide premium grade carbon for superior absorption and should be replaced every 2 to 4 weeks.
Fluval A1379 Edge Carbon Renewal Sachets 3-Pack specifications: