Features:

Biochemical sponge filter provides biological filtration to the aquarium, helps to stable water quality.
Using hollow polyester fiber, soft quality, strong water filtration, can be used repeatedly after cleaning.
Scrub resistance, not easy to damage, not easy to deform.

Increase the oxygen solubility.

Working noiselessly.

Good permeability, easy to clean.

Perfect filters accessories for your tank and aquarium.

Speicificaitons:

Product name: Replace Cotton for Aquarium Sponge Filter

Color: Yellow

Sponge Size: 55mmx55mm
Reminder:

1. Soak the sponge in the aquarium water for 5 minutes before use, by doing this will help nitrifying bateria colonise easier.

2. Always use aquarium water under room temperature to rinse clean the sponge, never use hot water.

Including:
2pcs Filter Sponge