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