Cascade Marlin Replacement Bio Sponge - Small Filters
- 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