【More Effective】Built-in new V-1 biochemical filter material, it is strong bacteria cultivation and easy to hang film. Filtration sponge is added at the bottom to intercept large particles of dirt. Combination of the biochemical and sponge and physical filtration makes it possible that our aquarium filter will achieve better results in filtering. 【Removable & Washable】There is a removable and washable filter cotton inside, you can easily replace it, which makes it easier for you to deal with cleaning issues. 【Quality Guarantee】Guarantee refund, if you have any dissatisfaction on the quality of goods, please contact us, we are willing to send you a new goods or a full refund.Package Included: 1 * Filter 4 * Suction Cup. 【Easy installation】Our Filter is equipped with the suction cups to make sure stable installation of product, it is easy to install and dismantle, thus you can apply it wherever you need it. 【High Quality】It is made from high quality plastic material, which is sturdy and