Features: 1.Brand new biochemical sponge filter 2.Provides biological filtration to the aquarium, helps to stable water quality 3.Increase the oxygen solubility 4.Working noiselessly 5.Good permeability, easy to clean 6.Adhere smooth surface with suction cup 7.Water inlet hole diameter: approx. 18mm Specifications: 1.Fit for 30cm/11.81″ aquarium 2.Demension:5.71 x 5.51in/14.5 x 14cm(L x W) 3.Weight:2.89oz/82g Package includes: […]