Filter for mechanical and biological filtering - Equipped with small exhaust stones, filter mats and bio ball filter materials to supply necessary water oxygen and ensure a quiet working environment. Recommended tank size: 10-25 liters 【This is an easy to disassemble filter】 The first separator is a sponge for mechanical filtration, the second separator is a clay ball filter for biology, the last layer is the base connected with the air tube. 【Innovative ultra-thin design】 Save space in the aquarium, more beautiful, filter Dimensions: 7.1cm x 8.1cm 【Its working principle is to connect the filter with the air pump through the air hose, and the airflow of the air pump is injected into the filter. The vacuum air drives the water flow through the sponge and the clay ball to achieve the effect of water filtration and oxygen accumulation. 【 Wide Application】Safe for fish, suitable for shrimp pond, betta pond, breeding pond, goldfish, focus fish, guppies, juveniles or other fish
