1 fish filter sponge

Description: This aquarium sponge filter provides both mechanical and biological filtration. Simply connect an air tube to aerate and filter your fish water. Aerobic bacteria colonize the sponge, creating an environment conducive to the nitrogen cycle. The sponge traps larger waste particles, cleaning the water without harming fry. This filter is ideal as a breeding filter or secondary filter. It can also be used as a pre-filter when connected to an external filter. Features: - Color: Black - Material: Sponge - Dimensions: 17.5 x 23.5 cm (extendable from 23.5 cm to 35.5 cm) - Easy installation with an air tube - Colonization of the sponge by aerobic bacteria, providing an environment conducive to the nitrogen cycle - Quiet operation, good permeability, and easy to clean