Filter Socks 100UM Extra Fine Filtration 4 Inch Ring by 9 Inch Long Premium Aquarium Filter Bags with Plastic Rings

Descriptions:
With a airlift system, super biochemical sponge filter features silent operation, and has an excellent filtering effect while oxygenating the water, the social developed foam materials supports the colonization of bacteria, allowing for mechanical filtration in addition to biological filtration, which will break down harmful waste, ammonia and nitrite material, resulting in a cleaner living environment for your fish, particular they are useful for as breeding filter or as secondary filter.

Features:
Brand New and High Quality
High-quality aquarium sponge filter for efficient biological filtration
Supports large bacterial populations to break down aquarium waste
Dense, high-quality foam ensure reliable longer lasting aquarium use
Do not trap fish fry and are safe for small size fish such as dwarf cichlid, guppy, killifish, etc.

Specifications:
Material: Plastic+Biochemical Sponge+Metal
Color: Black
Height: 12cm
Diameter: 5.5cm
Quantity: 1 Set

Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-3cm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!