DONGKER Sponge Filter,Mini Aquarium Single Bio Filter for Fish Tank Oxygen Increasing and Cycle

【Fine Biochemical Cotton Filtration】Sturdy, Detachable and Easy to Clean,,traps debris or waste without absorbing up your fish, keeping a crystal clear water tank. 【Easy to Clean】It Needs to Be Used in Conjunction With An Air Pump; Soak in Aquarium Water For 5 Minutes before Use; Be Careful Not to Use Tap Water and Hot Water to Soak For Cleaning 【Easy to Install】The Strong Suction Cup Is Fixed on the Wall of the Fish Tank and Is Not Easy to Fall Off.small and Takes Up Little Space. 【Mini Size】 9CMx7.5CMx4CM. Suitable for the breeding and feeding of various ornamental fish, shrimp or fry. 【Silent Design】Air powered and causing no disturbance to your daily life. Press the sponge into the tank to fully absorb tank water to make it sink to the bottom.