X-Large Bio Sponge Filter Breeding Fry Fish Tank Aquarium up to 220 Gal Beds suitable for engraving on the

suitable for engraving on the backside and can double as an ID tag

Velcro squares included

Vibration Assist

360 degree illumination

A maximum of three extensions can be used

X-Large Bio Sponge Filter Breeding Fry Fish Tank Aquarium up to 220 Gal Beds suitable for engraving on theSponge filters provide both mechanical and biological filtration. Simply install an airline into the unit and provide both aeration and filtration for your fish. Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle. In addition, the sponge traps larger waste particles mechanically cleaning the water without trapping baby fish. This X Large sponge filter is good for large tank up to 220 gallon. They are