Bio Sponge - Cascade Marlin OCF1/OCF2/OCF3/OCF11/OCF12/OCF13
- Replacement biological sponge for the Cascade Marlin line of filters
- Includes 1 sponge per package
- This media fits OCF1, OCF2, OCF3, OCF11, OCF12 and OCF13
- This media DOES NOT fit OCF4, OCF5, OCF14 or OCF15