MY MIRONEY 3.07" x 3.07" Aquarium Sponge Filter Air Driven Oxygen Releases Multi-Layer Filtration Biochemical Stone Sponge Corner Filter Pack of 2 - Product Features
Square Sponge Filter Size:78 x 78 x 105mm/3.07\" x 3.07\" x 4.13\"(L*W*H).
Perfect for the betta,dwarf cichlids,guppies,shrimp and fish breeding tanks or hatcheries,maternity and fry tanks.
The square sponge betta filter is placed directly into your fish tank and you need to simply connect it to your air pump via airline.
With multi-layer sponge filters,this filter combines physical and biochemical filtration for your fish and increases the oxygen solubility.
Three different refined layers have a stronger filtering effect.A white cotton pad is a top layer while a green sponge is the second and maifanite gravel makes up the third layer.