DescriptionThis is the Protein Cotton Water Filter. It is specially designed for Aquarium. Use this product, you will get a clear and clean fish tank. Suitable for water filter, provide fishes a fresh and healthy environment. With the removal of yellow water, anti-algae derivatives, remove fishy odor, adsorption of nitrate, nitrite and other functions.Features-Color:White -Material:Protein Cotton -Size(250ml):8.50X8.50X6.50cm/3.34X3.34X2.55in -The Fish Tank Protein Cotton can effectively inhibit the growth of the algae and then improve water quality. -Fish Tank Protein Cotton can removing the yellow water and can absorb the nitrate, providing a good environment for your fish. -The item can be reused and will not do harm to your fish, much convenient and practical. -Made of well selected materials, super toughness and resistance to pressure. -The excellent workmanship of our product will bring you a good using experience.