Things You'll Need
- External box filter
- Old towels
- Trash receptacle
- New filter pad
Instructions
Disconnect the power supply from the aquarium filter as well as pumps and heaters to avoid electric shock.
Lift out the old filter pad from the filter box. It will be full of water, so have a trash receptacle nearby and use old towels to clean up drips.
Discard the used filter.
Remove the new filter pad from its package and tap it gently inside the trash receptacle to shake off excess charcoal dust.
Slide the filter pad into place in the external filter.
Fill the filter box with water before turning the power back on (this is called priming the filter).
Turn power on to resume pumping water through the filter.