Mini Sponge Fish Filter Ultra Quiet 3-In-1 Filtration System Air Pump Filter For Small Fish Tank

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.