Mini Sponge Filter - 9.8 × 3cm, suitable for small fish tanks, such as spherical fish tanks, small fish tanks, special-shaped fish tanks and other family small fish tanks.
Layer Filtration System - Funnel air outlet, gas stone filtration and biochemical filter sponge. Note: This bio filter must be used with an oxygen pump.（This product does not contain air pump）
Suction Cup Design - Strong suction force, can be installed anywhere on the fish tank glass. Do not use an oversized air pump to avoid uneven mixing of water and air.
Filtering Function - Small volume but large function, this tank filter can effectively perform biochemical filtration.
Easy to Care - It is recommended to wash the filter cotton with fish tank water to avoid destroying the formed colonies. Clean the sponge once a month and change it every 5 to 6 months.
