Mini sponge filter: 9.8 x 3 cm, suitable for small fish containers, such as spherical fish containers, small fish containers, special-shaped fish containers and other small fish containers. family fish. Layer filtration system: funnel outlet, stone filter and biochemical filter sponge. Note: This biological filter must be used with an oxygen pump. (This product does not contain an air pump) Suction cup design: strong suction, can be installed anywhere on the fish tank glass. Do not use an oversized air pump to avoid uneven mixing of water and air. Filtration function: This tank filter with small volume and large function can simultaneously perform biochemical filtration to maintain the cleaning effect. Easy maintenance: it is recommended to wash the wadding with aquarium water so as not to destroy the colonies formed. Clean the sponge once a month and change it every 5-6 months.
