The internal filter is designed for 50-100L small aquarium and the canister is easy to remove, convenient to clean and maintain. Sponge is combined perfectly with the activated carbon and has wonderful filtration. The activated carbon can efficiently absorb organic matters, chemicals and get rid of odours. Colour: as per picture. The Tetrafin fish food is a high quality complete food which is an imported product. It provides growth, energy and vitality.