【Protect water quality】The oxygen filter can biologically filter, stabilize water quality, add oxygen solubility, increase oxygen content in water. aquarium and increase the survival rate. 【Three-layer filtration】 The bottom of the mini aquarium air filter is a layer of biochemical sponge to prevent small fish from being sucked into the filter. The stand is bubble stone and the top is the funnel outlet. It can increase the oxygen levels in the aquarium and increase the survival rate. 【Suction cup design】The air sponge filter comes with a suction cup that is attached to prevent fish from moving through the water. It can be installed anywhere on the glass of the aquarium. 【High quality materials】 The aquarium sponge filter is made of high quality durable plastic , non-toxic and durable. It is harmless to all fish and harmless to the environment. 【Widely Used】The organic sponge filter is suitable for small aquariums such as spherical aquariums, small aquariums, special-shaped aquariums
